I have used Disk2VHD to get a copy of a machine and have brought it to a Hyper-V host running 2022 but all I get is a flashing cursor when I start the VM.

BootRec finds the install OK.

What else can I do?

What does bootrec /rebuildbcd give?

This option should scan all disks for installations of windows that are Windows Vista or Windows 7 compatible. It shoud then allow you toi add them to the boot records.

If not try rebuilding it manually with:

bcdedit /export C:\BCD_Backup

c:

cd boot

attrib bcd -s -h -r

ren c:\boot\bcd bcd.old

[*]bootrec /RebuildBcd

---

BTW go into diskpart and see if your disk is a GPT format, if so you will need to recreate the UEFI folder:

find the 100MB partition and reformat and assign letter=b: to that location

Exit diskpart and run bcdboot c:\windows /s b: /f UEFI to recreate the files.

it must be a FAT partition

---