Installation and Upgrade Dual Boot Windows 11 with Windows 10


  • Staff
Windows_11_banner2.png

This tutorial will show you how to dual boot Windows 11 with Windows 10 on the same PC.

Windows 11 has all the power and security of Windows 10 with a redesigned and refreshed look. It also comes with new tools, sounds, and apps. Every detail has been considered. All of it comes together to bring you a refreshing experience on your PC.

If you already have Windows 10 installed and want to keep it, you can install Windows 11 on another partition or disk to dual boot Windows 11 with Windows 10.

Windows 11 minimum system requirements:

If you’d like to see if your current PC meets the minimum requirements, download and run the PC Health Check app.



Currently the Windows 11 boot entry is still named Windows 10 (top one), so you may wish to change this OS name in boot options to Windows 11 until this is fixed in a future release.



Contents

  • Option One: Dual Boot Windows 11 with Windows 10 by Installing Windows 11 at Boot
  • Option Two: Dual Boot Windows 11 with Windows 10 by Installing Windows 11 from within Windows 10


EXAMPLE: "Choose an operating system" screen at boot when Windows 11 installed at boot

Dual_boot_Windows11_with_Windows10-1.png
Dual_boot_Windows11_with_Windows10-2.png


EXAMPLE: "Windows Boot Manager" F8 screen at boot when Windows 11 installed from within Windows 10

Dual_boot_Windows11_with_Windows10-3.png
Dual_boot_Windows11_with_Windows10-4.png





Option One

Dual Boot Windows 11 with Windows 10 by Installing Windows 11 at Boot


1 Boot into Windows 10, and perform one of the following actions depending if you want to install Windows 11 to a partition or separate empty disk: (see screenshot below)
  • Shrink a partition on a disk to create unallocated space large enough to install Windows 11 on.
  • Run the clean command on a disk to wipe the disk to be unallocated.
Dual_boot_Windows_11_at_boot-1.png

2 If you have not already, you will need to create a bootable Windows 11 installation USB that supports UEFI mode.

3 Temporarily disconnect all non OS hard drives until Windows installation has finished for the following reasons:
  • To avoid you mistakenly deleting or formatting the wrong disk or drive.
  • To prevent Windows Setup from installing the boot configuration files (bootloader) to a different connected hard drive instead of on the disk Windows will be installed on.
4 Boot from the Windows 11 installation USB flash drive on your computer.

5 Continue at step 5 in this tutorial (click on link) to finish installing Windows 11.

6 When you get to step 11 in the same tutorial (click on link) select the Unallocated Space partition or disk created from step 1 to install Windows 11 on. (see screenshot below)

Dual_boot_Windows_11_at_boot-3.png

7 After the computer restarts during the installation, you will need to click/tap on the top Windows 10 (actually Windows 11) in the Choose an operating system screen to continue with Windows Setup. (see screenshot below)

Dual_boot_Windows_11_at_boot-2.png




Option Two

Dual Boot Windows 11 with Windows 10 by Installing Windows 11 from within Windows 10


1 Boot into Windows 10, and perform one of the following actions depending if you want to install Windows 11 to a partition or separate empty disk: (see screenshot below)
  • Create a partition on a disk with the name Windows 11 that is large enough to install Windows 11 on.
  • Format a disk with the name Windows 11.
Dual_boot_Windows_11_in_Windows10-1.png

2 Temporarily disconnect all non OS hard drives until Windows installation has finished for the following reasons:
  • To avoid you mistakenly deleting or formatting the wrong disk or drive.
  • To prevent Windows Setup from installing the boot configuration files (bootloader) to a different connected hard drive instead of on the disk Windows will be installed on.
3 Perform one of the following actions depending on if you are using a Windows 11 USB or ISO:
4 Open the mounted ISO or connected USB in File Explorer (Win+E) > This PC. (see screenshot below)

Dual_boot_Windows_11_in_Windows10-2.png

5 Open the sources folder. (see screenshot below)

Dual_boot_Windows_11_in_Windows10-3.png

6 Run the setup.exe file. (see screenshot below)

Dual_boot_Windows_11_in_Windows10-4.png

7 If prompted by UAC, click/tap on Yes. (see screenshot below)

Dual_boot_Windows_11_in_Windows10-5.png

8 Click/tap on No thanks. (see screenshot below)

You can check or uncheck (default) I want to help make the Windows installation better depending on what you want. This will send setup info to Microsoft to help improve.


Dual_boot_Windows_11_in_Windows10-6.png

9 Continue at step 7 in this tutorial (click on link) to finish installing Windows 11.

10 When you get to step 11 in the same tutorial (click on link) select the Windows 11 labeled Primary partition or disk created from step 1 to install Windows 11 on. (see screenshot below)

Dual_boot_Windows_11_in_Windows10-7.png

11 After the computer restarts during the installation, you will need to click/tap on the top Windows 11 in the Windows Boot Manager F8 screen to continue with Windows Setup. (see screenshot below)

Dual_boot_Windows_11_in_Windows10-8.png


That's it,
Shawn Brink


 

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Last edited:

My Computers

System One System Two

  • OS
    Windows 11 Pro for Workstations
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom self build
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING (11GB GDDR5X)
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G75 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3 wall mounted
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gbps Download and 35 Mbps Upload
    Browser
    Google Chrome
    Antivirus
    Microsoft Defender and Malwarebytes Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    HP Spectre x360 2in1 14-eu0098nr (2024)
    CPU
    Intel Core Ultra 7 155H 4.8 GHz
    Memory
    16 GB LPDDR5x-7467 MHz
    Graphics card(s)
    Integrated Intel Arc
    Sound Card
    Poly Studio
    Monitor(s) Displays
    14" 2.8K OLED multitouch
    Screen Resolution
    2880 x 1800
    Hard Drives
    2 TB PCIe NVMe M.2 SSD
    Internet Speed
    Intel Wi-Fi 7 BE200 (2x2) and Bluetooth 5.4
    Browser
    Chrome and Edge
    Antivirus
    Windows Defender and Malwarebytes Premium
(y)Nothing wrong, we're just people


7 After the computer restarts during the installation, you will need to click/tap on the top Windows 10 (actually Windows 11) in the Choose an operating system screen to continue with Windows Setup. (see screenshot below)

I guess it's fixed, I already had Windows 11 there
 
Last edited:

My Computer

System One

  • OS
    Windows 10/11
    Computer type
    PC/Desktop
    CPU
    AMD Ryzen 5 2600 Six
    Motherboard
    GIGABYTE B450 GAMING X / Seasonic Focus GX 550 Gold
    Memory
    32 GB DDR4
    Graphics Card(s)
    AMD Radeon RX 5500 XT
    Monitor(s) Displays
    Acer EK240YAbi - LED monitor 23,8"
    Hard Drives
    SSD 250GB / WDC 1000GB
(y)Nothing wrong, we're just people


7 After the computer restarts during the installation, you will need to click/tap on the top Windows 10 (actually Windows 11) in the Choose an operating system screen to continue with Windows Setup. (see screenshot below)

I guess it's fixed, I already had Windows 11 there
Good. I was taking the screenshots with a preview copy.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro for Workstations
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom self build
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING (11GB GDDR5X)
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G75 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3 wall mounted
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gbps Download and 35 Mbps Upload
    Browser
    Google Chrome
    Antivirus
    Microsoft Defender and Malwarebytes Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    HP Spectre x360 2in1 14-eu0098nr (2024)
    CPU
    Intel Core Ultra 7 155H 4.8 GHz
    Memory
    16 GB LPDDR5x-7467 MHz
    Graphics card(s)
    Integrated Intel Arc
    Sound Card
    Poly Studio
    Monitor(s) Displays
    14" 2.8K OLED multitouch
    Screen Resolution
    2880 x 1800
    Hard Drives
    2 TB PCIe NVMe M.2 SSD
    Internet Speed
    Intel Wi-Fi 7 BE200 (2x2) and Bluetooth 5.4
    Browser
    Chrome and Edge
    Antivirus
    Windows Defender and Malwarebytes Premium
You usually see the black and white screen if you didn't install at boot, and installed from within Windows.
Now it boots to the Metro menu. Sometimes to the black and white menu. I don't see any pattern.
 

My Computer

System One

  • OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Paradigit
    CPU
    Core i7
    Motherboard
    ASUS PRIME B560M-A
    Memory
    16 GB
    Graphics Card(s)
    On-board Graphics
    Sound Card
    On-Board Sound Card
    Monitor(s) Displays
    SAMSUNG 27"
    Screen Resolution
    1920 x1080
    Hard Drives
    Intel 1GB NVMe SSD
    Internet Speed
    500 Mb/s
IMO the best way to dual boot W10 and W11 is to create a Virtual Hard disk (VHDX) , attach it to the W10 system - note NOT a Virtual Machine and you don't have to have HYPER-V or W10 PRO either), install W11 to the Virtual hard drive, then when you want to boot W11 the boot menu will show a choice between W10 and W11 which it will show as W11 (VHD). Works perfectly and won't interfere with existing OS at all -- The nice thing about the "Virtual Hard Drive" is you can have several of these so you can test loads of different Windows versions and have the Virtual HDD / SSD as an external device too --useful for testing W11 on more than 1 machine without re-installing everything or having different languages etc etc.

On more details on this process there's plenty of posts on this forum.

Cheers
jimbo
 

My Computer

System One

  • OS
    Windows XP,7,10,11 Linux Arch Linux
    Computer type
    PC/Desktop
    CPU
    2 X Intel i7
I need some help, please.
I am dual booting 10 pro and 11 pro, W10 on an m.2 and W11 on SSD, Default is W10. Boot manager is on W10, there is no EFI partition on the W11 SSD

1635186831549.png



I decided to clean install W10 which of course deleted the dual boot menu.
bcdedit only showed the windows 10 installation.
So I added bcdboot f:\windows, and this brought back the dual boot menu, W11 is now the default.

I changed the default to W10 and I can boot to either OS now.

Two things: 1, not a big deal, but bcdedit lists the W11 entry first, I would prefer W10 entry listed first:scream:. Mostly just to learn how to do it. My searches turned up nothing using bcdedit, and I only know enough to be a few steps above dangerous...:wink:

2, When I boot to the default from the Blue OS choices menu, the OS is loaded right away. If I choose the other drive, there is an extra boot (restart) before it loads the second OS. In other words, Choose default, no extra boot, choose second OS, extra boot. Does not matter which OS I set as the default, the behavior is the same. I do have fast startup disabled on both.

How do I correct this? Thanks in advance.
 

My Computers

System One System Two

  • OS
    Windows 10 21H1, Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    roll yer own
    CPU
    i5 10600k
    Motherboard
    ASUS Prime Z590M-Plus
    Memory
    Corsair Vengeance LPX 16GB /3200 MHz
    Graphics Card(s)
    ASUS GTX 1650 OC
    Monitor(s) Displays
    Dell S3221QS
    Screen Resolution
    3840 x 2160
    Hard Drives
    Samsung 980NVME 500GB (Windows 10Pro), EVO870 500GB (Windows 11Pro),EVO870 1TB (Data), EVO870 500GB (Virtual Machines)
    PSU
    EVGA 500BR
    Case
    Thermaltake Versa H18
    Cooling
    BeQuiet Dark Rock 4
    Keyboard
    Logi K800
    Mouse
    Performance MX Master 2S
    Internet Speed
    Like the bird chiseling onto a tablet on the Flintstones
  • Operating System
    Windows 10 21H1
    Computer type
    Laptop
    Manufacturer/Model
    HP Envy 360 Convertible 15.6"
    CPU
    Ryzen5-4500U
    Memory
    I6 GB
    Monitor(s) Displays
    HP27es secondary
    Screen Resolution
    1080
    Hard Drives
    Crucial 1TB NVME
Two things: 1, not a big deal, but bcdedit lists the W11 entry first, I would prefer W10 entry listed first:scream:. Mostly just to learn how to do it. My searches turned up nothing using bcdedit, and I only know enough to be a few steps above dangerous...:wink:

2, When I boot to the default from the Blue OS choices menu, the OS is loaded right away. If I choose the other drive, there is an extra boot before it loads the second OS. In other words, Choose default, no extra boot, choose second OS, extra boot. Does not matter which OS I set as the default, the behavior is the same. I do have fast startup disabled on both.

How do I correct this? Thanks in advance.

Hello, :)

Q1) By default, the last OS installed is considered the default OS and will be listed first in the boot menu. You can use an option in the tutorial below to change the default OS to be Windows 11 so it's listed first.


Q2) Unfortunately, whenever you select a different OS than the default, the computer will always restart to boot the selected OS.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro for Workstations
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom self build
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING (11GB GDDR5X)
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G75 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3 wall mounted
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gbps Download and 35 Mbps Upload
    Browser
    Google Chrome
    Antivirus
    Microsoft Defender and Malwarebytes Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    HP Spectre x360 2in1 14-eu0098nr (2024)
    CPU
    Intel Core Ultra 7 155H 4.8 GHz
    Memory
    16 GB LPDDR5x-7467 MHz
    Graphics card(s)
    Integrated Intel Arc
    Sound Card
    Poly Studio
    Monitor(s) Displays
    14" 2.8K OLED multitouch
    Screen Resolution
    2880 x 1800
    Hard Drives
    2 TB PCIe NVMe M.2 SSD
    Internet Speed
    Intel Wi-Fi 7 BE200 (2x2) and Bluetooth 5.4
    Browser
    Chrome and Edge
    Antivirus
    Windows Defender and Malwarebytes Premium
Thank you, Brink!

I understand the listings for the boot menu.
I was wondering how to list the windows 10 entry first in cmd with bcdedit. I know it doesn't really matter.

The reason I ask is because previously, I had used easybcd to add 11 to the menu. Everything worked, but when I entered a bcdedit /v command, it listed the boot manager, then W10, then W 11. I decided to restore the original boot manger entry (no dual boot, only one OS listed). I then did the "bcdboot f:\windows" command, got the dual boot menu back, and it now lists boot manager, W11 then W10. That is what made me curious about the order, and if that had anything to do with question 2, which you answered. Thanks again.
 
Last edited:

My Computers

System One System Two

  • OS
    Windows 10 21H1, Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    roll yer own
    CPU
    i5 10600k
    Motherboard
    ASUS Prime Z590M-Plus
    Memory
    Corsair Vengeance LPX 16GB /3200 MHz
    Graphics Card(s)
    ASUS GTX 1650 OC
    Monitor(s) Displays
    Dell S3221QS
    Screen Resolution
    3840 x 2160
    Hard Drives
    Samsung 980NVME 500GB (Windows 10Pro), EVO870 500GB (Windows 11Pro),EVO870 1TB (Data), EVO870 500GB (Virtual Machines)
    PSU
    EVGA 500BR
    Case
    Thermaltake Versa H18
    Cooling
    BeQuiet Dark Rock 4
    Keyboard
    Logi K800
    Mouse
    Performance MX Master 2S
    Internet Speed
    Like the bird chiseling onto a tablet on the Flintstones
  • Operating System
    Windows 10 21H1
    Computer type
    Laptop
    Manufacturer/Model
    HP Envy 360 Convertible 15.6"
    CPU
    Ryzen5-4500U
    Memory
    I6 GB
    Monitor(s) Displays
    HP27es secondary
    Screen Resolution
    1080
    Hard Drives
    Crucial 1TB NVME
Thank you, Brink!

I understand the listings for the boot menu.
I was wondering how to list the windows 10 entry first in cmd with bcdedit. I know it doesn't really matter.

The reason I ask is because previously, I had used easybcd to add 11 to the menu. Everything worked, but when I entered a bcdedit /v command, it listed the boot manager, then W10, then W 11. I decided to restore the original boot manger entry (no dual boot, only one OS listed). I then did the "bcdboot f:\windows" command, got the dual boot menu back, and it now lists boot manager, W11 then W10. That is what made me curious about the order, and if that had anything to do with question 2, which you answered. Thanks again.

I'm not sure of how to change the listing order in bcdedit. Personally, I wouldn't risk trying to change it since it could cause the OS to be unbootable.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro for Workstations
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom self build
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING (11GB GDDR5X)
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G75 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3 wall mounted
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gbps Download and 35 Mbps Upload
    Browser
    Google Chrome
    Antivirus
    Microsoft Defender and Malwarebytes Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    HP Spectre x360 2in1 14-eu0098nr (2024)
    CPU
    Intel Core Ultra 7 155H 4.8 GHz
    Memory
    16 GB LPDDR5x-7467 MHz
    Graphics card(s)
    Integrated Intel Arc
    Sound Card
    Poly Studio
    Monitor(s) Displays
    14" 2.8K OLED multitouch
    Screen Resolution
    2880 x 1800
    Hard Drives
    2 TB PCIe NVMe M.2 SSD
    Internet Speed
    Intel Wi-Fi 7 BE200 (2x2) and Bluetooth 5.4
    Browser
    Chrome and Edge
    Antivirus
    Windows Defender and Malwarebytes Premium
I used VisualBCD to change the OS listing and msconfig to set the default. It comes up in the black and white menu. Both boot immediately they are selected.
 

My Computer

System One

  • OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Paradigit
    CPU
    Core i7
    Motherboard
    ASUS PRIME B560M-A
    Memory
    16 GB
    Graphics Card(s)
    On-board Graphics
    Sound Card
    On-Board Sound Card
    Monitor(s) Displays
    SAMSUNG 27"
    Screen Resolution
    1920 x1080
    Hard Drives
    Intel 1GB NVMe SSD
    Internet Speed
    500 Mb/s
IMO the best way to dual boot W10 and W11 is to create a Virtual Hard disk (VHDX) , attach it to the W10 system - note NOT a Virtual Machine and you don't have to have HYPER-V or W10 PRO either), install W11 to the Virtual hard drive, then when you want to boot W11 the boot menu will show a choice between W10 and W11 which it will show as W11 (VHD). Works perfectly and won't interfere with existing OS at all -- The nice thing about the "Virtual Hard Drive" is you can have several of these so you can test loads of different Windows versions and have the Virtual HDD / SSD as an external device too --useful for testing W11 on more than 1 machine without re-installing everything or having different languages etc etc.

On more details on this process there's plenty of posts on this forum.

Cheers
jimbo
Hi Jimbo, does Windows 11 installed in VHDX perform as fast as installing it directly? Also, what do you mean by "won't interfere with existing OS at all"? In a dual boot config without VHDX I understand that the 2nd OS does not interfere with the original OS, or am I missing something?
 

My Computer

System One

  • OS
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Dell
    CPU
    Intel i7
    Memory
    32GB
Once I have a dual boot system, how do you revert back to the original single OS one? Thanks
 

My Computer

System One

  • OS
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Dell
    CPU
    Intel i7
    Memory
    32GB
Once I have a dual boot system, how do you revert back to the original single OS one? Thanks

Hello, :-)

If you mean how to undo the dual boot, you would:

1) Make sure the OS you want to keep is set as the default OS in msconfig.

2) Delete the OS in msconfig you do not want.

3) You can now delete the partition/drive the OS you want to remove is installed on.

 

My Computers

System One System Two

  • OS
    Windows 11 Pro for Workstations
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom self build
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING (11GB GDDR5X)
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G75 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3 wall mounted
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gbps Download and 35 Mbps Upload
    Browser
    Google Chrome
    Antivirus
    Microsoft Defender and Malwarebytes Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    HP Spectre x360 2in1 14-eu0098nr (2024)
    CPU
    Intel Core Ultra 7 155H 4.8 GHz
    Memory
    16 GB LPDDR5x-7467 MHz
    Graphics card(s)
    Integrated Intel Arc
    Sound Card
    Poly Studio
    Monitor(s) Displays
    14" 2.8K OLED multitouch
    Screen Resolution
    2880 x 1800
    Hard Drives
    2 TB PCIe NVMe M.2 SSD
    Internet Speed
    Intel Wi-Fi 7 BE200 (2x2) and Bluetooth 5.4
    Browser
    Chrome and Edge
    Antivirus
    Windows Defender and Malwarebytes Premium
Thanks Brink, I have one more concern. Is a dual boot setup stable and in general without issues? I'm asking this because another member said that updating one OS can interfere with the other OS, as if the OS's are not completely isolated from each other. In the end, can a dual boot lead to data loss or an unbootable OS? Also, if I perform a backup with a 3rd party software like Acronis, can I selectively backup each OS separately or the backup has to include the full dual boot system (both OSs). Thanks
 

My Computer

System One

  • OS
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Dell
    CPU
    Intel i7
    Memory
    32GB
Thanks Brink, I have one more concern. Is a dual boot setup stable and in general without issues? I'm asking this because another member said that updating one OS can interfere with the other OS, as if the OS's are not completely isolated from each other. In the end, can a dual boot lead to data loss or an unbootable OS? Thanks

I've never had an issue with a dual boot, but there certainly is more that could go wrong.

If you keep updated system images, you'll have a backup if the worse case situation should happen whether it's a dual boot or not.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro for Workstations
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom self build
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING (11GB GDDR5X)
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G75 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3 wall mounted
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gbps Download and 35 Mbps Upload
    Browser
    Google Chrome
    Antivirus
    Microsoft Defender and Malwarebytes Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    HP Spectre x360 2in1 14-eu0098nr (2024)
    CPU
    Intel Core Ultra 7 155H 4.8 GHz
    Memory
    16 GB LPDDR5x-7467 MHz
    Graphics card(s)
    Integrated Intel Arc
    Sound Card
    Poly Studio
    Monitor(s) Displays
    14" 2.8K OLED multitouch
    Screen Resolution
    2880 x 1800
    Hard Drives
    2 TB PCIe NVMe M.2 SSD
    Internet Speed
    Intel Wi-Fi 7 BE200 (2x2) and Bluetooth 5.4
    Browser
    Chrome and Edge
    Antivirus
    Windows Defender and Malwarebytes Premium

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