✅ Solution: Boot Windows 7 VM from IDE, Not SCSI
???? Step-by-Step Fix:
1. Ensure VHD is connected to IDE, not SCSI
- Shut down the VM.
- Open Hyper-V Manager → VM Settings.
- Under IDE Controller 0, add your system VHD.
- Remove it from SCSI Controller if it was attached there.
- Ensure the boot order is correct (IDE first).
Important: Windows 7 does not have native support for Hyper-V SCSI during boot (unless manually enabled before migration).
2. Make Sure You’re Using a Generation 1 VM
- Hyper-V Generation 2 = UEFI boot, requires GPT and special drivers.
- Windows 7 is not UEFI-friendly without modification.
✅ Make sure:
- VM is Generation 1
- Disk is MBR, not GPT.
If the VM is Generation 2, you’ll need to recreate it as Generation 1.
3. If Still BSOD: Inject IDE/SATA Drivers (Offline Fix)
If your Windows image doesn’t have the correct IDE/AHCI drivers, you can enable them:
From Windows Recovery Command Prompt:
- Boot into the Windows 7 ISO → Repair → Command Prompt.
- Run regedit
- Load the offline system hive:
- Select HKEY_LOCAL_MACHINE
- File → Load Hive
- Navigate to your Windows partition → C:\Windows\System32\Config\SYSTEM
- Call it Offline
- Go to the following keys and set Start to 0 (enables driver):
- HKEY_LOCAL_MACHINE\Offline\ControlSet001\Services\pciide
- HKEY_LOCAL_MACHINE\Offline\ControlSet001\Services\intelide
- HKEY_LOCAL_MACHINE\Offline\ControlSet001\Services\msahci
- HKEY_LOCAL_MACHINE\Offline\ControlSet001\Services\atapi
- When done:
- Select Offline → File → Unload Hive
- Close regedit
Run the following commands
- bootrec /fixmbr
- bootrec /fixboot
- bootrec /scanos
- bootrec /rebuildbcd
- bcdboot C:\Windows /s C:
✅ Then Try Booting Again
- Boot from IDE
- Use Generation 1
- Ensure drivers are enabled in registry if needed
Bonus: Run chkdsk if File System Issues Suspected
chkdsk C: /f
