Watch the video:
Timestamps:
0:00 - Intro/The error
0:40 - Encrypted the drive?
1:21 - Fix Key Protector error
2:28 - Using fixed virtual machine in Hyper-V
2:50 - Merge checkpoints if not working in Hyper-V
6:26 - Using restored VM
If you’re using Hyper-V and trying to import an older Virtual Machine from another version of Windows, another computer, etc., you may encounter this (or a similar) error. This video shows you how to fix this error, as well as a lot of others, and start using your old virtual machine again.
If you encrypted the drive, see: https://www.elevenforum.com/t/hyper-v-tpm-issue-with-windows-11-on-new-device.14704/