Start virtualised domain controller in DSRM (Active Directory Restore Mode).
If you have a totally virtualised Active Directory infrastructure in Hyper-V, you can't boot the VM into Directory Services Restore Mode using F8. The keypress is not recognised. To get around this, in a elevated command prompt, type: bcdedit /set {globalsettings} advancedoptions true Now when you reboot the DC, it will ask if you want to boot into restore mode, and you can restore A.D. After rebooting, type the command: bcdedit /set {globalsettings} advancedoptions false and it will boot normally again. Now you have to find the restore mode password....