I created a VM using Hyper-V-Manager and was able to start the VM and use it for a week.
Today Hyper-V-Manager would not show me my VM.
C:\ProgramData\Microsoft\Windows\Hyper-V\Virtual Machines and was able to find some files and an empty folder:
The date & time of these files match the time i turned off the machine yesterday. My virtual HDD (the .vhdx file) also exists in its custom place.
The Hyper-V-Manager does not show any options in the 'actions' pane on the right side (stuff like: New, Import Virtual Machine..., Hyper-V Settings..., etc.). The only options it shows is 'Connect to Server...' .
Windows 10 Pro
Hyper-V-Manager: Management Console 3.0, Version 1803