Win 11 Key Backward Compatible?


Leo625

Member
Local time
6:05 AM
Posts
2
OS
Windows 10
Hi All:
I am getting ready to put Win 11 on here so went to the store and bought 11 Pro. Now I learn it will only work with GPT. I can certainly make my system GPT but prefer not to. Can I use this key to install another Windows 10 Pro on this machine for dual boot?
Thanks for the advise.

Leo625
 
Windows Build/Version
Ver. 21H1 Rev. 19043.1288

My Computer

System One

  • OS
    Windows 10
    Computer type
    PC/Desktop
    Manufacturer/Model
    Leo625`s Amazing Time Killers
    CPU
    AMD RYZEN 5 2600
    Motherboard
    GIGABYTE X470 AORUS Gaming 7 WIFI
    Memory
    MEM 2Gx8|G.SKILL AEGIS
    Graphics Card(s)
    NVIDIA 750 Ti
    Sound Card
    Motherboard
    Monitor(s) Displays
    LG
    Screen Resolution
    1920 X 1080
    Hard Drives
    WD 1TB Black
    PSU
    Corsair 750
    Case
    Old
    Cooling
    3 - 120MM Fans and CoolerMaster Hyper 612 on CPU
    Keyboard
    Wired and Lighted Logitech
    Mouse
    Wireless Logitech
    Internet Speed
    Decent
    Browser
    Firefox

AddRAM

This is the way !
Power User
VIP
Local time
7:05 AM
Posts
644
Location
Mandalore
OS
Windows 11 Pro
Not true, it can be installed on a MBR disk.
Lotsa tutorials here.
Not sure about the key, but someone will be along soon to answer that question.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Skylake Special X299
    CPU
    Intel Core i9 9900X
    Motherboard
    Asus ROG Strix X299-E Gaming II
    Memory
    GSkill Trident Z RGB 32GB 3600 16-16-16-36 (F4-3600C16Q-32GTZR)
    Graphics Card(s)
    EVGA RTX 3080 12GB FTW3 Ultra Gaming (12G-P5-4877-KL)
    Sound Card
    Supreme FX
    Monitor(s) Displays
    Asus PG279Q
    Screen Resolution
    2560 x 1440 165Hz
    Hard Drives
    Samsung 980 Pro 500GB x2, Seagate Barracuda 4TB x2, Western Digital Black 4TB x1
    PSU
    EVGA 1200 P2, EVGA Black Custom Braided Cables
    Case
    Thermaltake View 31 Tempered Glass Limited Edition
    Cooling
    Corsair H115i, Thermal Grizzly Kryonaut
    Keyboard
    Logitech G910 Orion Spark
    Mouse
    Logitech G700s, Asus ROG GX860 Buzzard
    Internet Speed
    Verizon Fios Quantum Gateway 75/75
    Browser
    Edge
    Antivirus
    Windows Defender, Malwarebytes 4.5.2
    Other Info
    Thermaltake Riing Duo 14 x3, Thermaltake Riing Plus 14 x2, Corsair HS70 Pro Wireless Headset
  • Operating System
    Windows 10 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Skylake Special Z170
    CPU
    Intel Core i7 6700K
    Motherboard
    Asus Sabertooth Z170 Mark 1
    Memory
    GSkill Trident Z RGB 16GB 3600 16-16-16-36 (F4-3600C16D-16GTZR)
    Graphics card(s)
    EVGA GTX 980 Ti SC x2, EVGA Pro SLI Bridge
    Sound Card
    Realtek High Definition
    Monitor(s) Displays
    AOC G2460PG
    Screen Resolution
    1920 x 1080 144Hz
    Hard Drives
    Samsung 870 Evo 500GB, Seagate Barracuda 4TB x2
    PSU
    EVGA 1000 P2, EVGA White Custom Braided Cables
    Case
    Corsair Vengeance C70 Gunmetal Black
    Cooling
    Corsair H100i v2, Corsair ML120 x2, Thermal Grizzly Kryonaut
    Mouse
    Logitech G500s
    Keyboard
    Logitech G910 Orion Spectrum
    Internet Speed
    Verizon Fios Quantum Gateway 75/75
    Browser
    Edge
    Antivirus
    Windows Defender, Malwarebytes 4.5.2
    Other Info
    Corsair SP120 x4, LG Blu-ray Drive, Durabrand HT-395 100 Watt Dolby Digital Amp

hsehestedt

Well-known member
Power User
VIP
Local time
6:05 AM
Posts
671
Location
Texas, USA
OS
Windows 11 21H2
Windows 10 and 11 keys are interchangeable, so you can install 10 with it. As noted, you can use MBR fine with Win 11.

Out of curiosity, why the opposition to GPT? It's a superior scheme. :)
 

My Computers

System One System Two

  • OS
    Windows 11 21H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-11700K
    Motherboard
    ASUS Prime Z590-A
    Memory
    128GB Crucial Ballistix 3200MHz DRAM
    Graphics Card(s)
    No GPU - CPU graphics only (for now)
    Sound Card
    Realtek (on motherboard)
    Monitor(s) Displays
    HP Envy 32
    Screen Resolution
    2560 x 1440
    Hard Drives
    1 x 1TB NVMe Gen 4 x 4 SSD
    1 x 2TB NVMe Gen 3 x 4 SSD
    2 x 512GB 2.5" SSDs
    2 x 8TB HD
    PSU
    Corsair HX850i
    Case
    Corsair iCue 5000X RGB
    Cooling
    Noctua NH-D15 chromax.black cooler + 10 case fans
    Keyboard
    CODE backlit mechanical keyboard
    Mouse
    Logitech MX Master 3
    Internet Speed
    300Mb down / 20Mb up
    Browser
    Chromium Edge
    Antivirus
    Windows Defender
    Other Info
    Additional options installed:
    WiFi 6E PCIe adapter
    ASUS ThunderboltEX 4 PCIe adapter
  • Operating System
    Windows 11 21H2
    Computer type
    Laptop
    Manufacturer/Model
    HP Spectre x360 15-BL012DX
    CPU
    Intel i7-7500U
    Memory
    32GB
    Graphics card(s)
    Dual Intel HD 620 and Nvidia GeForce 940MX
    Sound Card
    Built-in Realtek HD Audio
    Monitor(s) Displays
    4k 15-inch
    Screen Resolution
    4k (3840 x 2160)
    Hard Drives
    1TB Seagate FireCuda 510 NVMe SSD
    Internet Speed
    300Mb down / 20Mb up
    Browser
    Chromium Edge
    Antivirus
    Windows Defender
    Other Info
    RAM Upgraded from 16GB to 32GB WiFi Upgraded from WiFi 5 to WiFi 6 SSD upgraded from 512GB NVMe SSD to 1TB Seagate FireCuda 510 NVMe SSD

hsehestedt

Well-known member
Power User
VIP
Local time
6:05 AM
Posts
671
Location
Texas, USA
OS
Windows 11 21H2
One more note - someone correct me if I am wrong - but if you plan to dual boot, I don't think you even need a second key. Since it is the same machine, it should detect that Windows has been previously activated on that machine and activate automatically via a digital license. Have not tried that myself, but that is my guess as to what would happen. I'm sure that someone else will either confirm that or correct me if I am wrong.
 

My Computers

System One System Two

  • OS
    Windows 11 21H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-11700K
    Motherboard
    ASUS Prime Z590-A
    Memory
    128GB Crucial Ballistix 3200MHz DRAM
    Graphics Card(s)
    No GPU - CPU graphics only (for now)
    Sound Card
    Realtek (on motherboard)
    Monitor(s) Displays
    HP Envy 32
    Screen Resolution
    2560 x 1440
    Hard Drives
    1 x 1TB NVMe Gen 4 x 4 SSD
    1 x 2TB NVMe Gen 3 x 4 SSD
    2 x 512GB 2.5" SSDs
    2 x 8TB HD
    PSU
    Corsair HX850i
    Case
    Corsair iCue 5000X RGB
    Cooling
    Noctua NH-D15 chromax.black cooler + 10 case fans
    Keyboard
    CODE backlit mechanical keyboard
    Mouse
    Logitech MX Master 3
    Internet Speed
    300Mb down / 20Mb up
    Browser
    Chromium Edge
    Antivirus
    Windows Defender
    Other Info
    Additional options installed:
    WiFi 6E PCIe adapter
    ASUS ThunderboltEX 4 PCIe adapter
  • Operating System
    Windows 11 21H2
    Computer type
    Laptop
    Manufacturer/Model
    HP Spectre x360 15-BL012DX
    CPU
    Intel i7-7500U
    Memory
    32GB
    Graphics card(s)
    Dual Intel HD 620 and Nvidia GeForce 940MX
    Sound Card
    Built-in Realtek HD Audio
    Monitor(s) Displays
    4k 15-inch
    Screen Resolution
    4k (3840 x 2160)
    Hard Drives
    1TB Seagate FireCuda 510 NVMe SSD
    Internet Speed
    300Mb down / 20Mb up
    Browser
    Chromium Edge
    Antivirus
    Windows Defender
    Other Info
    RAM Upgraded from 16GB to 32GB WiFi Upgraded from WiFi 5 to WiFi 6 SSD upgraded from 512GB NVMe SSD to 1TB Seagate FireCuda 510 NVMe SSD

jaree1961

Well-known member
Member
VIP
Local time
9:05 PM
Posts
154
Location
Brisbane Australia
OS
Windows 11 Pro 21H2 Build-22000.675
One more note - someone correct me if I am wrong - but if you plan to dual boot, I don't think you even need a second key. Since it is the same machine, it should detect that Windows has been previously activated on that machine and activate automatically via a digital license. Have not tried that myself, but that is my guess as to what would happen. I'm sure that someone else will either confirm that or correct me if I am wrong.
@hsehestedt is correct. Tried it myself and YES it works flawlessly
 

My Computers

System One System Two

  • OS
    Windows 11 Pro 21H2 Build-22000.675
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home built
    CPU
    Intel S1200 Core i3 10105
    Motherboard
    Gigabyte S1200 MicroATX B560M DS3H DDR4
    Memory
    16.0 GB
    Graphics Card(s)
    MSI GT710 2GB PCIe Video Card
    Sound Card
    Realtek® Audio CODEC
    Monitor(s) Displays
    Dual Acer 24in
    Screen Resolution
    1920 x 1080
    Hard Drives
    500GB Crucial P1 M.2 PCIe SSD
    PSU
    500W
    Case
    Thermaltake ATX Versa H21 Case
    Cooling
    Internal fans by (3)
    Keyboard
    Microsoft Wireless Keyboard 850
    Mouse
    Microsoft Wireless mouse
    Internet Speed
    50Mbps / 20Mbps
    Browser
    Chrome
    Antivirus
    Defender, Malwarebyte
  • Operating System
    Windows 11 Pro 21H2 Build-22000.675
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home built Test-PC
    CPU
    Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz
    Motherboard
    ASUS S1150 MicroATX B85M-E
    Memory
    12.0 GB
    Graphics card(s)
    Integrated Video Card
    Sound Card
    Integrated Sound Card
    Monitor(s) Displays
    Chimei 22"
    Screen Resolution
    1680 x 1050
    Hard Drives
    120GB WD 2.5" Green SATA 6Gb/s SSD
    1TB WD 3.5" 7200rpm SATA 6Gb/s Caviar Blue
    PSU
    400W
    Case
    Cougar MicroATX MG100 Case Black
    Cooling
    Deepcool 120mm Case Fan
    Mouse
    Logitech Wireless mouse
    Keyboard
    Logitech Wireless keyboard
    Internet Speed
    50Mbps / 20Mbps
    Browser
    Chrome
    Antivirus
    Defender
    Other Info
    Only running Win 11 on this PC for test purposes

Wynona

Well-known member
Power User
VIP
Local time
6:05 AM
Posts
1,366
Location
Arkansas
OS
Windows 11 20000.613
One more note - someone correct me if I am wrong - but if you plan to dual boot, I don't think you even need a second key. Since it is the same machine, it should detect that Windows has been previously activated on that machine and activate automatically via a digital license. Have not tried that myself, but that is my guess as to what would happen. I'm sure that someone else will either confirm that or correct me if I am wrong.
I bought this machine with Windows 10 Pro, did a clean install of 10 Pro, then added Windows 11 Home (in error). Since my students all have Home anyway, I'll stick with Home for now. I didn't buy a copy of Windows 11.
 

My Computers

System One System Two

  • OS
    Windows 11 20000.613
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP Envy TE01-1xxx
    CPU
    ntel(R) Core(TM) i7-10700 CPU @ 2.90GHz 2.90 GHz
    Motherboard
    16.0GB Dual-Channel Unknown @ 1463MHz (21-21-21-47)
    Memory
    16384 MBytes
    Graphics Card(s)
    Intel UHD Graphics 630
    Sound Card
    Realtek High Definition Audio
    Monitor(s) Displays
    Monitor 1 - Acer 27" Monitor 2 - Acer 27"
    Screen Resolution
    1920 x 1080
    Hard Drives
    WDC PC SN530 SDBPNPZ-512G-1006 (SSD)
    Seagate ST1000DM003-1SB102
    Seagate BUP Slim SCSI Disk Device (SSD)
    PSU
    HP
    Case
    HP
    Cooling
    Standard
    Keyboard
    Logitech Wave K350
    Mouse
    Logitech M705
    Internet Speed
    100 mbps
    Browser
    Firefox
    Antivirus
    Windows Defender
    Other Info
    That's all Folks!
  • Operating System
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP
    CPU
    Intel Core i7 (10th gen) 10700
    Motherboard
    Intel
    Memory
    16 GB
    Graphics card(s)
    Intel UHD Graphics 630
    Sound Card
    Built-in
    Monitor(s) Displays
    Acer 27" & Samsung 24"
    Screen Resolution
    1920 x
    Hard Drives
    SSD (512 GB)
    HDD (1 TB)
    Seagate
    PSU
    Intel i7 10th Generation
    Case
    HP
    Cooling
    HP/Intel?
    Mouse
    Logitech M705
    Keyboard
    Logitech Wave K350
    Internet Speed
    50 mbps
    Browser
    Firefox 90.2
    Antivirus
    Windows Defender
    Other Info
    Headphone/Microphone Combo
    SuperSpeed USB Type-A (4 on front)
    HP 3-in-One Card Readr
    SuperSpeed USB Type-C
    DVD Writer

spapakons

Well-known member
Power User
Local time
2:05 PM
Posts
788
Location
Athens
OS
Windows 11 Pro 21H2 64-bit (build 22000.282)
You can bypass compatibility check and install on MBR or even a very old system without UEFI (only Legacy BIOS), as long as it has a 64-bit CPU capable of running at least Windows 8 64-bit. No need to repeat anything here, just read the relevant threads at the Installation section. The official Microsoft ISO supports all versions, including Windows 11 Home and Pro. If you are asked for version, select Pro. You can use your key to activate. If you are not asked (because a Windows 8 key or later is detected in the UEFI Firmware and used automatically) and you get Windows 11 Home, you can then change the key to upgrade to Pro.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro 21H2 64-bit (build 22000.282)
    Computer type
    Laptop
    Manufacturer/Model
    Acer Extensa 5630EZ
    CPU
    Mobile DualCore Intel Core 2 Duo T7250, 2000 MHz
    Motherboard
    Acer Extensa 5630
    Memory
    4GB
    Graphics Card(s)
    Mobile Intel(R) GMA 4500M (Mobile 4 series)
    Sound Card
    Realtek ALC268 @ Intel 82801IB ICH9 - High Definition Audio Controller
    Monitor(s) Displays
    1
    Screen Resolution
    1280x800
    Hard Drives
    Samsung SSD 850 EVO 250GB SATA Device (250 GB, SATA-III)
    Internet Speed
    VDSL 50 Mbps
    Browser
    MICROSOFT EDGE
    Antivirus
    WINDOWS DEFENDER
    Other Info
    This is my test laptop, not fully updated yet. For my main PC I use everyday see my 2nd system specs
  • Operating System
    Windows 11 Pro v21H2 (build 22000.675)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom-built PC
    CPU
    Intel Core-i7 3770 3.40GHz s1155 (3rd generation)
    Motherboard
    Asus P8H61 s1155 ATX
    Memory
    2x Kingston Hyper-X Blu 8GB DDR3-1600
    Graphics card(s)
    Asus GT620-1GD3 (nVidia GeForce GT 620 1GB DDR3)
    Sound Card
    Realtek HD audio (ALC887)
    Monitor(s) Displays
    Sony Bravia KDL-19L4000 19" LCD TV via VGA
    Screen Resolution
    1440x900 32-bit 60Hz
    Hard Drives
    Patriot Burst Elite 480GB SSD as system disk, Western Digital Caviar Purple 4TB SATA III (WD40PURZ) as second
    PSU
    Thermaltake Litepower RGB 550W Full Wired
    Case
    SUPERCASE MIDI-TOWER
    Cooling
    Stock Intel CPU Fan, 1x 8cm fan at the back
    Mouse
    Sunnyline OptiEye PS/2
    Keyboard
    Mitsumi 101-key PS/2
    Internet Speed
    100Mbps
    Browser
    Microsoft Edge, Mozilla Firefox
    Antivirus
    Microsoft Windows Defender
    Other Info
    Legacy BIOS (MBR) installation, no TPM, no Secure Boot, WDDM 2.3 graphics drivers, WEI score 5.1

hsehestedt

Well-known member
Power User
VIP
Local time
6:05 AM
Posts
671
Location
Texas, USA
OS
Windows 11 21H2
If you are asked for version, select Pro. You can use your key to activate. If you are not asked (because a Windows 8 key or later is detected in the UEFI Firmware and used automatically) and you get Windows 11 Home, you can then change the key to upgrade to Pro.
Just thought that I would add a related note here. If you are installing from a flash / thumb drive and you run into this situation that @spapakons notes above, where Windows setup does not ask what edition to install, simply do this:

Open notepad and type in these two lines:

[Channel]
Retail

Save the file as ei.cfg (make sure that there is no .txt extension at the end).
Drop that file into the \Sources folder of your Windows installation disk.

Windows setup will now offer you a choice of editions to install (Home, Pro, Education, etc.).

Of course, I'm making the assumption that you are using Windows media that includes all those editions, such as when you download an ISO image from Microsoft or you use the Windows Media Creation Tool.
 

My Computers

System One System Two

  • OS
    Windows 11 21H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-11700K
    Motherboard
    ASUS Prime Z590-A
    Memory
    128GB Crucial Ballistix 3200MHz DRAM
    Graphics Card(s)
    No GPU - CPU graphics only (for now)
    Sound Card
    Realtek (on motherboard)
    Monitor(s) Displays
    HP Envy 32
    Screen Resolution
    2560 x 1440
    Hard Drives
    1 x 1TB NVMe Gen 4 x 4 SSD
    1 x 2TB NVMe Gen 3 x 4 SSD
    2 x 512GB 2.5" SSDs
    2 x 8TB HD
    PSU
    Corsair HX850i
    Case
    Corsair iCue 5000X RGB
    Cooling
    Noctua NH-D15 chromax.black cooler + 10 case fans
    Keyboard
    CODE backlit mechanical keyboard
    Mouse
    Logitech MX Master 3
    Internet Speed
    300Mb down / 20Mb up
    Browser
    Chromium Edge
    Antivirus
    Windows Defender
    Other Info
    Additional options installed:
    WiFi 6E PCIe adapter
    ASUS ThunderboltEX 4 PCIe adapter
  • Operating System
    Windows 11 21H2
    Computer type
    Laptop
    Manufacturer/Model
    HP Spectre x360 15-BL012DX
    CPU
    Intel i7-7500U
    Memory
    32GB
    Graphics card(s)
    Dual Intel HD 620 and Nvidia GeForce 940MX
    Sound Card
    Built-in Realtek HD Audio
    Monitor(s) Displays
    4k 15-inch
    Screen Resolution
    4k (3840 x 2160)
    Hard Drives
    1TB Seagate FireCuda 510 NVMe SSD
    Internet Speed
    300Mb down / 20Mb up
    Browser
    Chromium Edge
    Antivirus
    Windows Defender
    Other Info
    RAM Upgraded from 16GB to 32GB WiFi Upgraded from WiFi 5 to WiFi 6 SSD upgraded from 512GB NVMe SSD to 1TB Seagate FireCuda 510 NVMe SSD

cereberus

Well-known member
Power User
VIP
Local time
12:05 PM
Posts
1,768
OS
Windows 10 Pro + others in VHDs
Trying to dual boot with mbr is really limiting if both OSs are on same drive. You can only have 4 primary partitions, so if on same drive, you would have the system partition, W11 partition, W10 partition, and that just leave 1 primary partition for general use.

It makes no sense to use legact mbt anymore.
 

My Computer

System One

  • OS
    Windows 10 Pro + others in VHDs
    Computer type
    Laptop
    Manufacturer/Model
    ASUS Vivobook 14
    CPU
    I7
    Motherboard
    Yep, Laptop has one.
    Memory
    16 GB
    Graphics Card(s)
    Integrated Intel Iris XE
    Sound Card
    Realtek built in
    Monitor(s) Displays
    N/A
    Screen Resolution
    1920x1080
    Hard Drives
    1 TB Optane NVME SSD, 1 TB NVME SSD
    PSU
    Yep, got one
    Case
    Yep, got one
    Cooling
    Stella Artois
    Keyboard
    Built in
    Mouse
    Bluetooth , wired
    Internet Speed
    72 Mb/s :-(
    Browser
    Edge mostly
    Antivirus
    Defender
    Other Info
    TPM 2.0

Winuser

Well-known member
Pro User
VIP
Local time
7:05 AM
Posts
2,825
OS
Windows 11
Hi All:
I am getting ready to put Win 11 on here so went to the store and bought 11 Pro. Now I learn it will only work with GPT. I can certainly make my system GPT but prefer not to. Can I use this key to install another Windows 10 Pro on this machine for dual boot?
Thanks for the advise.

Leo625
If your computer was already running Windows 10 Pro, you didn't need to buy Windows 11. You could have download an ISO from MS and upgraded to Windows 11 for free.
 

My Computers

System One System Two

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    PowerSpec B746
    CPU
    Intel Core i7-10700K
    Motherboard
    ASRock Z490 Phantom Gaming 4/ax
    Memory
    16GB (8GB PC4-19200 DDR4 SDRAM x2)
    Graphics Card(s)
    NVIDIA GeForce GTX 1050 TI
    Sound Card
    Realtek Audio
    Monitor(s) Displays
    Samsung SAM0A87 Samsung SAM0D32
    Screen Resolution
    1920 x 1080
    Hard Drives
    NVMe WDC WDS100T2B0C-00PXH0 1TB
    Samsung SSD 860 EVO 1TB
    PSU
    750 Watts (62.5A)
    Case
    PowerSpec/Lian Li ATX 205
    Keyboard
    Logitech K270
    Mouse
    Logitech M185
    Browser
    Microsoft Edge and Firefox
    Antivirus
    ESET Internet Security
  • Operating System
    Windows 11 Dev
    Computer type
    Laptop
    Manufacturer/Model
    HP Envy x360 15-ds1083cl
    CPU
    AMD Ryzen 7 4700U 2.0GHZ
    Memory
    16 MB DDR 4-2666
    Graphics card(s)
    AMD Radeon
    Monitor(s) Displays
    15.6"
    Screen Resolution
    1920x1080
    Hard Drives
    PCIe NVMe M.2 512GB
    Browser
    Firefox, Edge and Edge Canary
    Antivirus
    ESET Internet Security

Bree

Well-known member
Pro User
VIP
Local time
12:05 PM
Posts
2,387
Location
S/E England, UK
OS
Windows 11 Home
I am getting ready to put Win 11 on here so went to the store and bought 11 Pro. Now I learn it will only work with GPT. I can certainly make my system GPT but prefer not to. Can I use this key to install another Windows 10 Pro on this machine for dual boot?
Thanks for the advise.
Welcome to Eleven Forum Leo625

Microsoft's keys do not distinguish between Windows 10 or 11, all keys are now referred to by Microsoft as being for Windows 10/11. See for example the wording used in the Microsoft Store:

view


The same applies to the digtal licence. If your PC is already activated with a digital licence for Windows 10, then you can clean install the same edition of Windows 11 on it without providing a key and it will actvate from the existing digital licence for that PC. Alternatively you could upgrade you installed Windows 10 to Windows 11 for free.

The bottom line is that if you have an activated Windows 10 Pro on your PC now, then you can install Windows 11 Pro for free. You can save the key you bought and use it on a new build.
 
Last edited:

My Computers

System One System Two

  • OS
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Acer Aspire 3 A315-23
    CPU
    AMD Athlon Silver 3050U
    Memory
    8GB
    Graphics Card(s)
    Radeon Graphics
    Monitor(s) Displays
    laptop screen
    Screen Resolution
    1366x768 native resolution, up to 2560x1440 with Radeon Virtual Super Resolution
    Hard Drives
    1TB HDD
    Browser
    Edge, Firefox
    Antivirus
    Defender
    Other Info
    fully 'Windows 11 ready' laptop. Windows 10 C: partition migrated from my old unsupported 'main machine' then upgraded to 11. A test migration ran Insider builds for 2 months. When 11 was released on 5th October it was re-imaged back to 10 and was offered the upgrade in Windows Update on 20th October.


    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, Windows 11 Pro.
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Dell Lattitude E4310
    CPU
    i5 M 520
    Motherboard
    0T6M8G
    Memory
    4GB
    Screen Resolution
    1366x768
    Hard Drives
    500GB HDD
    Browser
    Firefox, Edge
    Antivirus
    Defender
    Other Info
    unsupported machine: Legacy bios, MBR, TPM 1.2, upgraded from W10 to W11 using W10/W11 hybrid install media workaround.


    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, Windows 11 Pro.

spapakons

Well-known member
Power User
Local time
2:05 PM
Posts
788
Location
Athens
OS
Windows 11 Pro 21H2 64-bit (build 22000.282)
Trying to dual boot with mbr is really limiting if both OSs are on same drive. You can only have 4 primary partitions, so if on same drive, you would have the system partition, W11 partition, W10 partition, and that just leave 1 primary partition for general use.

It makes no sense to use legact mbt anymore.
If you dual boot, you need no more than 4 primary partitions. If you want to triple boot, you should use two or more disks. MBR is used to avoid wasting precious disk space for the extra partitions of GPT. Even better, you can create only a single NTFS partition taking the whole disk space and install Windows 11 without any hidden system partition. This in practice gives you a little more space than the 500MB of the hidden partition, since the data are aligned differently. When we are talking about small SSDs of 120GB or even smaller (tablets and old netbooks with only 32GB or 64GB space) any MB you save counts. Other than that I never noticed any gain in performance when using GPT to justify adopting it. Never seen any difference in compatibility either, assuming you have properly installed all drivers. There is nothing for me to justify using GPT instead of MBR, unless forced by the hardware (such as UEFI only system, Legacy not available, or using an NVMe SSD disk that can boot only in UEFI mode).
 

My Computers

System One System Two

  • OS
    Windows 11 Pro 21H2 64-bit (build 22000.282)
    Computer type
    Laptop
    Manufacturer/Model
    Acer Extensa 5630EZ
    CPU
    Mobile DualCore Intel Core 2 Duo T7250, 2000 MHz
    Motherboard
    Acer Extensa 5630
    Memory
    4GB
    Graphics Card(s)
    Mobile Intel(R) GMA 4500M (Mobile 4 series)
    Sound Card
    Realtek ALC268 @ Intel 82801IB ICH9 - High Definition Audio Controller
    Monitor(s) Displays
    1
    Screen Resolution
    1280x800
    Hard Drives
    Samsung SSD 850 EVO 250GB SATA Device (250 GB, SATA-III)
    Internet Speed
    VDSL 50 Mbps
    Browser
    MICROSOFT EDGE
    Antivirus
    WINDOWS DEFENDER
    Other Info
    This is my test laptop, not fully updated yet. For my main PC I use everyday see my 2nd system specs
  • Operating System
    Windows 11 Pro v21H2 (build 22000.675)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom-built PC
    CPU
    Intel Core-i7 3770 3.40GHz s1155 (3rd generation)
    Motherboard
    Asus P8H61 s1155 ATX
    Memory
    2x Kingston Hyper-X Blu 8GB DDR3-1600
    Graphics card(s)
    Asus GT620-1GD3 (nVidia GeForce GT 620 1GB DDR3)
    Sound Card
    Realtek HD audio (ALC887)
    Monitor(s) Displays
    Sony Bravia KDL-19L4000 19" LCD TV via VGA
    Screen Resolution
    1440x900 32-bit 60Hz
    Hard Drives
    Patriot Burst Elite 480GB SSD as system disk, Western Digital Caviar Purple 4TB SATA III (WD40PURZ) as second
    PSU
    Thermaltake Litepower RGB 550W Full Wired
    Case
    SUPERCASE MIDI-TOWER
    Cooling
    Stock Intel CPU Fan, 1x 8cm fan at the back
    Mouse
    Sunnyline OptiEye PS/2
    Keyboard
    Mitsumi 101-key PS/2
    Internet Speed
    100Mbps
    Browser
    Microsoft Edge, Mozilla Firefox
    Antivirus
    Microsoft Windows Defender
    Other Info
    Legacy BIOS (MBR) installation, no TPM, no Secure Boot, WDDM 2.3 graphics drivers, WEI score 5.1

hsehestedt

Well-known member
Power User
VIP
Local time
6:05 AM
Posts
671
Location
Texas, USA
OS
Windows 11 21H2
This is not an attempt to discourage use of MBR, just some additional data points so that you have a more complee picture of the differences between MBR and GPT.

You may not notice any real differences in your daily usage, but there are technical aspects of GPT that make it greatly superior to MBR. Included among these:

  • Supports 128 partitions rather than 4 (technically, it's pretty much unlimited, the 128 partition limit is imposed by Windows, not GPT)
  • HDDs greater than 2TB are supported
  • Uses CRC for integrity checking
  • Contains backup copies of GPT partition and header info
  • Allows faster boot times
The CRC and backup copies allow for automatic repair of boot data. With MBR steps must be taken manually to attempt repairs.

While Win 11 can use MBR, this is technically unsupported.
 

My Computers

System One System Two

  • OS
    Windows 11 21H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-11700K
    Motherboard
    ASUS Prime Z590-A
    Memory
    128GB Crucial Ballistix 3200MHz DRAM
    Graphics Card(s)
    No GPU - CPU graphics only (for now)
    Sound Card
    Realtek (on motherboard)
    Monitor(s) Displays
    HP Envy 32
    Screen Resolution
    2560 x 1440
    Hard Drives
    1 x 1TB NVMe Gen 4 x 4 SSD
    1 x 2TB NVMe Gen 3 x 4 SSD
    2 x 512GB 2.5" SSDs
    2 x 8TB HD
    PSU
    Corsair HX850i
    Case
    Corsair iCue 5000X RGB
    Cooling
    Noctua NH-D15 chromax.black cooler + 10 case fans
    Keyboard
    CODE backlit mechanical keyboard
    Mouse
    Logitech MX Master 3
    Internet Speed
    300Mb down / 20Mb up
    Browser
    Chromium Edge
    Antivirus
    Windows Defender
    Other Info
    Additional options installed:
    WiFi 6E PCIe adapter
    ASUS ThunderboltEX 4 PCIe adapter
  • Operating System
    Windows 11 21H2
    Computer type
    Laptop
    Manufacturer/Model
    HP Spectre x360 15-BL012DX
    CPU
    Intel i7-7500U
    Memory
    32GB
    Graphics card(s)
    Dual Intel HD 620 and Nvidia GeForce 940MX
    Sound Card
    Built-in Realtek HD Audio
    Monitor(s) Displays
    4k 15-inch
    Screen Resolution
    4k (3840 x 2160)
    Hard Drives
    1TB Seagate FireCuda 510 NVMe SSD
    Internet Speed
    300Mb down / 20Mb up
    Browser
    Chromium Edge
    Antivirus
    Windows Defender
    Other Info
    RAM Upgraded from 16GB to 32GB WiFi Upgraded from WiFi 5 to WiFi 6 SSD upgraded from 512GB NVMe SSD to 1TB Seagate FireCuda 510 NVMe SSD

NavyLCDR

Well-known member
Power User
VIP
Local time
4:05 AM
Posts
843
OS
Windows 11
If you dual boot, you need no more than 4 primary partitions. If you want to triple boot, you should use two or more disks. MBR is used to avoid wasting precious disk space for the extra partitions of GPT. Even better, you can create only a single NTFS partition taking the whole disk space and install Windows 11 without any hidden system partition. This in practice gives you a little more space than the 500MB of the hidden partition, since the data are aligned differently. When we are talking about small SSDs of 120GB or even smaller (tablets and old netbooks with only 32GB or 64GB space) any MB you save counts. Other than that I never noticed any gain in performance when using GPT to justify adopting it. Never seen any difference in compatibility either, assuming you have properly installed all drivers. There is nothing for me to justify using GPT instead of MBR, unless forced by the hardware (such as UEFI only system, Legacy not available, or using an NVMe SSD disk that can boot only in UEFI mode).
So, I did an experiment. I created 2 Virtual Drives both 128 GB in size. The first was partitioned with MBR and 1 primary partition, marked as active. I applied a Windows 10 image to it. Then made it bootable with the BCDBOOT command for BIOS booting only.

The second was partitioned with GPT, 1 EFI system partition (100 MB), 1 MSR partition (16 MB), and the rest 1 primary partition. I applied the exact same Windows 10 image to it, and then made it bootable with the BCDBOOT command, system files saved to the EFI system partition, for UEFI booting only.

After all that, the OS partition on the GPT disk had 112.64 MB less free space than the OS partition on the MBR disk.
 

My Computers

System One System Two

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Homebuilt
    CPU
    AMD Ryzen 7 3800XT
    Motherboard
    ASUS ROG Crosshair VII Hero (WiFi)
    Memory
    32GB
    Graphics Card(s)
    EVGA GeForce GTX 1080 Ti
  • Operating System
    Windows 11 Education
    Computer type
    Laptop
    Manufacturer/Model
    Dell Inspiron 7773
    CPU
    Intel i7-8550U
    Memory
    32GB
    Graphics card(s)
    Nvidia Geforce MX150
    Sound Card
    Realtek
    Monitor(s) Displays
    17"
    Screen Resolution
    1920 x 1080
    Hard Drives
    Toshiba 512GB NVMe SSD
    SK Hynix 512GB SATA SSD
    Internet Speed
    Fast!

spapakons

Well-known member
Power User
Local time
2:05 PM
Posts
788
Location
Athens
OS
Windows 11 Pro 21H2 64-bit (build 22000.282)
You took into account only the OS partition. If you add the other small partitions, you lose over 1GB of space. I would use GPT only if the hardware forced me, as explained in my previous reply, or to create a single partition larger than 2TB on a hard disk larger than 2TB.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro 21H2 64-bit (build 22000.282)
    Computer type
    Laptop
    Manufacturer/Model
    Acer Extensa 5630EZ
    CPU
    Mobile DualCore Intel Core 2 Duo T7250, 2000 MHz
    Motherboard
    Acer Extensa 5630
    Memory
    4GB
    Graphics Card(s)
    Mobile Intel(R) GMA 4500M (Mobile 4 series)
    Sound Card
    Realtek ALC268 @ Intel 82801IB ICH9 - High Definition Audio Controller
    Monitor(s) Displays
    1
    Screen Resolution
    1280x800
    Hard Drives
    Samsung SSD 850 EVO 250GB SATA Device (250 GB, SATA-III)
    Internet Speed
    VDSL 50 Mbps
    Browser
    MICROSOFT EDGE
    Antivirus
    WINDOWS DEFENDER
    Other Info
    This is my test laptop, not fully updated yet. For my main PC I use everyday see my 2nd system specs
  • Operating System
    Windows 11 Pro v21H2 (build 22000.675)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom-built PC
    CPU
    Intel Core-i7 3770 3.40GHz s1155 (3rd generation)
    Motherboard
    Asus P8H61 s1155 ATX
    Memory
    2x Kingston Hyper-X Blu 8GB DDR3-1600
    Graphics card(s)
    Asus GT620-1GD3 (nVidia GeForce GT 620 1GB DDR3)
    Sound Card
    Realtek HD audio (ALC887)
    Monitor(s) Displays
    Sony Bravia KDL-19L4000 19" LCD TV via VGA
    Screen Resolution
    1440x900 32-bit 60Hz
    Hard Drives
    Patriot Burst Elite 480GB SSD as system disk, Western Digital Caviar Purple 4TB SATA III (WD40PURZ) as second
    PSU
    Thermaltake Litepower RGB 550W Full Wired
    Case
    SUPERCASE MIDI-TOWER
    Cooling
    Stock Intel CPU Fan, 1x 8cm fan at the back
    Mouse
    Sunnyline OptiEye PS/2
    Keyboard
    Mitsumi 101-key PS/2
    Internet Speed
    100Mbps
    Browser
    Microsoft Edge, Mozilla Firefox
    Antivirus
    Microsoft Windows Defender
    Other Info
    Legacy BIOS (MBR) installation, no TPM, no Secure Boot, WDDM 2.3 graphics drivers, WEI score 5.1

NavyLCDR

Well-known member
Power User
VIP
Local time
4:05 AM
Posts
843
OS
Windows 11
You took into account only the OS partition. If you add the other small partitions, you lose over 1GB of space. I would use GPT only if the hardware forced me, as explained in my previous reply, or to create a single partition larger than 2TB on a hard disk larger than 2TB.
Nope. We will have to agree to disagree. Two exact same bootable installations of Windows 10, the loss due to GPT partitions is 112.64 MB, not 1 GB+.
 

My Computers

System One System Two

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Homebuilt
    CPU
    AMD Ryzen 7 3800XT
    Motherboard
    ASUS ROG Crosshair VII Hero (WiFi)
    Memory
    32GB
    Graphics Card(s)
    EVGA GeForce GTX 1080 Ti
  • Operating System
    Windows 11 Education
    Computer type
    Laptop
    Manufacturer/Model
    Dell Inspiron 7773
    CPU
    Intel i7-8550U
    Memory
    32GB
    Graphics card(s)
    Nvidia Geforce MX150
    Sound Card
    Realtek
    Monitor(s) Displays
    17"
    Screen Resolution
    1920 x 1080
    Hard Drives
    Toshiba 512GB NVMe SSD
    SK Hynix 512GB SATA SSD
    Internet Speed
    Fast!

hsehestedt

Well-known member
Power User
VIP
Local time
6:05 AM
Posts
671
Location
Texas, USA
OS
Windows 11 21H2
You took into account only the OS partition. If you add the other small partitions, you lose over 1GB of space. I would use GPT only if the hardware forced me, as explained in my previous reply, or to create a single partition larger than 2TB on a hard disk larger than 2TB.
I'll let NavyLCDR respond, but I think he took the other partitions into account. He very clearly notes the MSR and EFI system partitions.

Again, not trying to push you to GPT, just want you to have accurate facts on hand so that your decisions can be based upon fact rather than fiction :).
 

My Computers

System One System Two

  • OS
    Windows 11 21H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-11700K
    Motherboard
    ASUS Prime Z590-A
    Memory
    128GB Crucial Ballistix 3200MHz DRAM
    Graphics Card(s)
    No GPU - CPU graphics only (for now)
    Sound Card
    Realtek (on motherboard)
    Monitor(s) Displays
    HP Envy 32
    Screen Resolution
    2560 x 1440
    Hard Drives
    1 x 1TB NVMe Gen 4 x 4 SSD
    1 x 2TB NVMe Gen 3 x 4 SSD
    2 x 512GB 2.5" SSDs
    2 x 8TB HD
    PSU
    Corsair HX850i
    Case
    Corsair iCue 5000X RGB
    Cooling
    Noctua NH-D15 chromax.black cooler + 10 case fans
    Keyboard
    CODE backlit mechanical keyboard
    Mouse
    Logitech MX Master 3
    Internet Speed
    300Mb down / 20Mb up
    Browser
    Chromium Edge
    Antivirus
    Windows Defender
    Other Info
    Additional options installed:
    WiFi 6E PCIe adapter
    ASUS ThunderboltEX 4 PCIe adapter
  • Operating System
    Windows 11 21H2
    Computer type
    Laptop
    Manufacturer/Model
    HP Spectre x360 15-BL012DX
    CPU
    Intel i7-7500U
    Memory
    32GB
    Graphics card(s)
    Dual Intel HD 620 and Nvidia GeForce 940MX
    Sound Card
    Built-in Realtek HD Audio
    Monitor(s) Displays
    4k 15-inch
    Screen Resolution
    4k (3840 x 2160)
    Hard Drives
    1TB Seagate FireCuda 510 NVMe SSD
    Internet Speed
    300Mb down / 20Mb up
    Browser
    Chromium Edge
    Antivirus
    Windows Defender
    Other Info
    RAM Upgraded from 16GB to 32GB WiFi Upgraded from WiFi 5 to WiFi 6 SSD upgraded from 512GB NVMe SSD to 1TB Seagate FireCuda 510 NVMe SSD

cereberus

Well-known member
Power User
VIP
Local time
12:05 PM
Posts
1,768
OS
Windows 10 Pro + others in VHDs
Nope. I'm afraid you are mistaken
Yep only difference really between an mbr install and an efi install is difference in size of mbr system partition and efi (50 MB as efi slightly larger by default) plus msr partition (16 MB) plus a slight difference in size of other two partitions.

So your 112 MB difference is about right, nothing like 1GB. If there is that much difference, I suspect reason is one install has a recovery partition, and other does not.
 

My Computer

System One

  • OS
    Windows 10 Pro + others in VHDs
    Computer type
    Laptop
    Manufacturer/Model
    ASUS Vivobook 14
    CPU
    I7
    Motherboard
    Yep, Laptop has one.
    Memory
    16 GB
    Graphics Card(s)
    Integrated Intel Iris XE
    Sound Card
    Realtek built in
    Monitor(s) Displays
    N/A
    Screen Resolution
    1920x1080
    Hard Drives
    1 TB Optane NVME SSD, 1 TB NVME SSD
    PSU
    Yep, got one
    Case
    Yep, got one
    Cooling
    Stella Artois
    Keyboard
    Built in
    Mouse
    Bluetooth , wired
    Internet Speed
    72 Mb/s :-(
    Browser
    Edge mostly
    Antivirus
    Defender
    Other Info
    TPM 2.0

AddRAM

This is the way !
Power User
VIP
Local time
7:05 AM
Posts
644
Location
Mandalore
OS
Windows 11 Pro
Most likely.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Skylake Special X299
    CPU
    Intel Core i9 9900X
    Motherboard
    Asus ROG Strix X299-E Gaming II
    Memory
    GSkill Trident Z RGB 32GB 3600 16-16-16-36 (F4-3600C16Q-32GTZR)
    Graphics Card(s)
    EVGA RTX 3080 12GB FTW3 Ultra Gaming (12G-P5-4877-KL)
    Sound Card
    Supreme FX
    Monitor(s) Displays
    Asus PG279Q
    Screen Resolution
    2560 x 1440 165Hz
    Hard Drives
    Samsung 980 Pro 500GB x2, Seagate Barracuda 4TB x2, Western Digital Black 4TB x1
    PSU
    EVGA 1200 P2, EVGA Black Custom Braided Cables
    Case
    Thermaltake View 31 Tempered Glass Limited Edition
    Cooling
    Corsair H115i, Thermal Grizzly Kryonaut
    Keyboard
    Logitech G910 Orion Spark
    Mouse
    Logitech G700s, Asus ROG GX860 Buzzard
    Internet Speed
    Verizon Fios Quantum Gateway 75/75
    Browser
    Edge
    Antivirus
    Windows Defender, Malwarebytes 4.5.2
    Other Info
    Thermaltake Riing Duo 14 x3, Thermaltake Riing Plus 14 x2, Corsair HS70 Pro Wireless Headset
  • Operating System
    Windows 10 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Skylake Special Z170
    CPU
    Intel Core i7 6700K
    Motherboard
    Asus Sabertooth Z170 Mark 1
    Memory
    GSkill Trident Z RGB 16GB 3600 16-16-16-36 (F4-3600C16D-16GTZR)
    Graphics card(s)
    EVGA GTX 980 Ti SC x2, EVGA Pro SLI Bridge
    Sound Card
    Realtek High Definition
    Monitor(s) Displays
    AOC G2460PG
    Screen Resolution
    1920 x 1080 144Hz
    Hard Drives
    Samsung 870 Evo 500GB, Seagate Barracuda 4TB x2
    PSU
    EVGA 1000 P2, EVGA White Custom Braided Cables
    Case
    Corsair Vengeance C70 Gunmetal Black
    Cooling
    Corsair H100i v2, Corsair ML120 x2, Thermal Grizzly Kryonaut
    Mouse
    Logitech G500s
    Keyboard
    Logitech G910 Orion Spectrum
    Internet Speed
    Verizon Fios Quantum Gateway 75/75
    Browser
    Edge
    Antivirus
    Windows Defender, Malwarebytes 4.5.2
    Other Info
    Corsair SP120 x4, LG Blu-ray Drive, Durabrand HT-395 100 Watt Dolby Digital Amp

NavyLCDR

Well-known member
Power User
VIP
Local time
4:05 AM
Posts
843
OS
Windows 11
I'll let NavyLCDR respond, but I think he took the other partitions into account. He very clearly notes the MSR and EFI system partitions.

Again, not trying to push you to GPT, just want you to have accurate facts on hand so that your decisions can be based upon fact rather than fiction :).
You are correct. I did take the other partitions into account. Here is Disk 4 and 5 (my experiment disks) in Minitool PW:

capture3.jpg
You lose 116 MB of disk space for the added partitions, but you gain a few MB of disk space back into the OS partition because the boot files (BCD) are in the EFI System Partition rather than in the OS partition itself.
 

My Computers

System One System Two

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Homebuilt
    CPU
    AMD Ryzen 7 3800XT
    Motherboard
    ASUS ROG Crosshair VII Hero (WiFi)
    Memory
    32GB
    Graphics Card(s)
    EVGA GeForce GTX 1080 Ti
  • Operating System
    Windows 11 Education
    Computer type
    Laptop
    Manufacturer/Model
    Dell Inspiron 7773
    CPU
    Intel i7-8550U
    Memory
    32GB
    Graphics card(s)
    Nvidia Geforce MX150
    Sound Card
    Realtek
    Monitor(s) Displays
    17"
    Screen Resolution
    1920 x 1080
    Hard Drives
    Toshiba 512GB NVMe SSD
    SK Hynix 512GB SATA SSD
    Internet Speed
    Fast!
Top Bottom