I've had significant battle with the errors that come up when Hyper-V is running in Win10-Pro. The links to "Manage Windows Defender Credential Guard" in the error message do not lead to the solution, it just wastes everyone's time. We found this answer through pure luck...
WOW, this is so much easier than the process outlined in the Microsoft article that the VMWare error in 14.5 refers to - it has you manually deleting registry keys, etc.
This worked for me - note that I got an error on reboot from Docker which apparently DOES require MSFT virtualization to be enabled - or maybe there's a config setting in Docker to fix this - but for being able to use VMWare this works fine.