Many thanks to QuestYouCraft. This was the missing key I was looking for!
Initial situation:
Brand new, clean install of 24H2. VBS and Hyper-V was enabled by default.
Solution:
- Turned off Core-Isolation Memory-Integrity (Memory-Integrity only)
- Reg-Key "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\DeviceGuard\EnableVirtualizationBasedSecurity" -> 0
- Reg-Key "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\WindowsHello\Enabled" -> 0
Restart and resetting Windows-Hello PIN (Windows prompts for it) - and that's it.
Sad that Microsoft is withholding this simple information from its loyal customers. Took a lot of time to gather the right and working informationen as there are so many posts in so many communites (including this one) about the topic without any satisfactory procedure or result.
Best regards