Dual boot (Win 10 and Win 11) doesn't work


Sineira

Sineira

Well-known member
Local time
10:12 AM
Posts
42
OS
Windows 11
The PC already had Win 11 on it.
I added a new SSD and installed Win 10 on the new SSD via a USB stick.
Of course dual boot now doesn't work.
It shows a menu with Win 11 and Win 10, it boots fine into Win 11 but not into Win 10.
If I try Win 10 it resets the PC and reboots.
I tried Macrium Reflect off a USB to repair the BCD but it made no change.
Now what?
 

My Computer My Computer

At a glance

Windows 11i9-9900KGigabyte RTX3080
OS
Windows 11
Computer type
PC/Desktop
CPU
i9-9900K
Motherboard
ASUS ROG MAXIMUS CODE XI
Graphics Card(s)
Gigabyte RTX3080
For me I used EasyBCD and just add the drive to the list
 

My Computers My Computers

System One System Two

  • At a glance

    WiN11 ProXeon E5450 3.0GHZ (OC 3.6GHZ)8GB (2GBX4)NVIDIA Quadro K2200 4GB
    OS
    WiN11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom 775 System
    CPU
    Xeon E5450 3.0GHZ (OC 3.6GHZ)
    Motherboard
    ASUS PQ5-EM
    Memory
    8GB (2GBX4)
    Graphics Card(s)
    NVIDIA Quadro K2200 4GB
    Sound Card
    Onboard
    Monitor(s) Displays
    ASUS 24"
    Screen Resolution
    1080p
    Hard Drives
    1TB|750GB USB, 3 SSDs 2 240GB 1 128GB, 750GB HDD
    PSU
    650WATT Rosewill
    Case
    Rosewill with side Window
    Cooling
    5 Fans and a big HSK for cpu
    Keyboard
    Rosewill RGB
    Mouse
    Rosewill RGB
    Internet Speed
    AT&T 150MB DL\UP
    Browser
    FireFox
    Antivirus
    None
    Other Info
    I'm lucky to even be here after 6yrs from my car accident

  • At a glance

    WiN10 LTSCi7 2670QM 2.20GHZ8GB (2X4GB) DUAL ChannelIntel HD Graphics 3000
    Operating System
    WiN10 LTSC
    Computer type
    Laptop
    Manufacturer/Model
    Hp 8460p
    CPU
    i7 2670QM 2.20GHZ
    Motherboard
    Hp 161C
    Memory
    8GB (2X4GB) DUAL Channel
    Graphics card(s)
    Intel HD Graphics 3000
    Sound Card
    Intel high Def (basically onboard)
    Screen Resolution
    1366x768
    Hard Drives
    OS 128GB l Storage (caddy) 320GB
    PSU
    AC (IDK the watts)
    Browser
    Firefox
    Antivirus
    Defender
    Other Info
    A USB 3.0 in the Express Card Slot
Same here

1662515527710.png


 

My Computers My Computers

System One System Two Other systems

  • At a glance

    Win 11 Pro 26H2 26300.9711Intel® Core™ i7-14700KG.SKILL Ripjaws S5 Series 64GB (2 x 32GB) DDR5ASUS GeForce RTX 4070 Super 12GB
    OS
    Win 11 Pro 26H2 26300.9711
    Computer type
    PC/Desktop
    Manufacturer/Model
    Self Built
    CPU
    Intel® Core™ i7-14700K
    Motherboard
    ASUS TUF Z690-PLUS WIFI (BIOS 4601)
    Memory
    G.SKILL Ripjaws S5 Series 64GB (2 x 32GB) DDR5
    Graphics Card(s)
    ASUS GeForce RTX 4070 Super 12GB
    Sound Card
    Sound Blaster AE-5 Plus
    Monitor(s) Displays
    ASUS TUF Gaming 27" 2K HDR Gaming
    Screen Resolution
    2560 x 1440
    Hard Drives
    Samsung 990 Pro 1TB NVMe (Win 11 25H2)
    SK hynix P41 500GB NVMe
    SK hynix P41 2TB NVMe (x3)
    Crucial P3 Plus 4TB
    PSU
    Corsair RM850x Shift
    Case
    Antec Dark Phantom DP502 FLUX
    Cooling
    Corsair Nautilus 360 RS AIO
    Keyboard
    Logitech MK 320
    Mouse
    Razer Basilisk V3
    Internet Speed
    750Mbs
    Browser
    Firefox
    Antivirus
    Winows Security
    Other Info
    MR 8.1 Home

  • At a glance

    Win 11 Pro 25H2 26300.9711Intel Core i5-1140064 GB DDR4MSI GeForce RTX 3060 Ventus 2X 12GB
    Operating System
    Win 11 Pro 25H2 26300.9711
    Computer type
    PC/Desktop
    Manufacturer/Model
    Self Built
    CPU
    Intel Core i5-11400
    Motherboard
    Asus TUF Gaming Z590 Plus WiFi (BIOS 2803)
    Memory
    64 GB DDR4
    Graphics card(s)
    MSI GeForce RTX 3060 Ventus 2X 12GB
    Sound Card
    SoundBlaster Audigy Fx V2
    Monitor(s) Displays
    Samsung F27T350
    Screen Resolution
    1920x1080
    Hard Drives
    Samsung 980 Pro 1TB
    Samsung 970 EVO Plus 2TB
    Samsung 870 EVO 500GB SSD
    PSU
    Corsair HX750
    Case
    Cougar MX330-G Window
    Cooling
    Thermalright Frozen Edge 240 Black AIO
    Internet Speed
    350Mbps
    Browser
    Firefox
    Antivirus
    Windows Security
  • System Three
    Win 11 Pro 25H2 26300.9711
    ASUS PRIME Z370-P II BIOS 3004 7/12/21
    Intel Core i7-8700 CPU @ 3.20GHz
    32GB DDR4 RAM (4x8)
    Samsung 980 Pro 500 GB
    SK hynix P41 1 TB
    EVGA RTX 2060 (used)
    iGPU Intel UHD Graphics 630 (backup)
    Cooler Master Hyper 212
    Mid-Tower Desktop
!@#$%^&*( EasyBCD.
It completely nuked the BCD and the PC was unbootable.
Luckily Macrium could save it back so I can get into Win 11 again.
I tried the EasyBCD Recovery disk on a USB and that one was halted by the BIOS as it behaved like a virus. I mean???

For some reason the dear Windows installers have ensured I have 4 EFI partitions. 2 on the brand new SSD. I mean WTF??
I love this clown level software quality.
 

My Computer My Computer

At a glance

Windows 11i9-9900KGigabyte RTX3080
OS
Windows 11
Computer type
PC/Desktop
CPU
i9-9900K
Motherboard
ASUS ROG MAXIMUS CODE XI
Graphics Card(s)
Gigabyte RTX3080
post a screenshot of diskmgmt window
 

My Computers My Computers

System One System Two

  • At a glance

    Win7,Win11i7-97002x16gb 3600mhz
    OS
    Win7,Win11
    Computer type
    PC/Desktop
    CPU
    i7-9700
    Motherboard
    gigabyte b365m ds3h
    Memory
    2x16gb 3600mhz
    Monitor(s) Displays
    benq gw2480
    PSU
    bequiet pure power 11 400CM
    Cooling
    cryorig m9i

  • At a glance

    win7,win11i5-84002x8gb 3200
    Operating System
    win7,win11
    Computer type
    PC/Desktop
    CPU
    i5-8400
    Motherboard
    gigabyte b365m ds3h
    Memory
    2x8gb 3200
    PSU
    xfx pro 450
Here you go!

1662544397823.png


1662544563290.png



Sorry for venting, wasting this much time does not make me happy.
 

My Computer My Computer

At a glance

Windows 11i9-9900KGigabyte RTX3080
OS
Windows 11
Computer type
PC/Desktop
CPU
i9-9900K
Motherboard
ASUS ROG MAXIMUS CODE XI
Graphics Card(s)
Gigabyte RTX3080
open admin cmd prompt and type:

bcdboot e:\windows /addlast
 

My Computers My Computers

System One System Two

  • At a glance

    Win7,Win11i7-97002x16gb 3600mhz
    OS
    Win7,Win11
    Computer type
    PC/Desktop
    CPU
    i7-9700
    Motherboard
    gigabyte b365m ds3h
    Memory
    2x16gb 3600mhz
    Monitor(s) Displays
    benq gw2480
    PSU
    bequiet pure power 11 400CM
    Cooling
    cryorig m9i

  • At a glance

    win7,win11i5-84002x8gb 3200
    Operating System
    win7,win11
    Computer type
    PC/Desktop
    CPU
    i5-8400
    Motherboard
    gigabyte b365m ds3h
    Memory
    2x8gb 3200
    PSU
    xfx pro 450
1662545111836.png
 

My Computer My Computer

At a glance

Windows 11i9-9900KGigabyte RTX3080
OS
Windows 11
Computer type
PC/Desktop
CPU
i9-9900K
Motherboard
ASUS ROG MAXIMUS CODE XI
Graphics Card(s)
Gigabyte RTX3080
  • Like
Reactions: WAI
SIW2 said:
open admin cmd prompt and type:

bcdboot e:\windows /addlast
Click to expand...
That worked! What does it do? I mean I read the description but ...
And how did you figure what was missing? I tried to find some data to look at to see what was wrong but ...
 

My Computer My Computer

At a glance

Windows 11i9-9900KGigabyte RTX3080
OS
Windows 11
Computer type
PC/Desktop
CPU
i9-9900K
Motherboard
ASUS ROG MAXIMUS CODE XI
Graphics Card(s)
Gigabyte RTX3080
  • Like
Reactions: WAI
Sineira said:
That worked! What does it do? I mean I read the description but ...
And how did you figure what was missing? I tried to find some data to look at to see what was wrong but ...
Click to expand...
It's called knowledge gained from many years of experience dealing with similar issues - or even just practicing commands when there is no issue. A lot of us "old school" users prefer to use the basic commands instead of relying upon third party programs that are not much more that GUI's for the commands that we know how to use.
 

My Computers My Computers

System One System Two

  • At a glance

    Windows 11AMD Ryzen 7 3800XT32GBEVGA GeForce GTX 1080 Ti
    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

  • At a glance

    Windows 11 EducationIntel i7-8550U32GBNvidia Geforce MX150
    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!
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