about two years ago i set up a Windows Server 2019 Hyper-V Core. The server worked fine and we already host several VMs on it.
A month or two into using it, i noticed that the administrator did not have any access rights for the C: drive anymore. Whenever i tried to do something on C: directly, or system critical folders, even if it was just a command like "dir", I would get "Access Denied"
sconfig also does not work, so I can't do any configuration on the system.
I have no idea what could have possibly caused this. Already tried a few things, everything i could find through google, but to no avail.
The admin has full reign on the connected D: RAID.
So far it worked fine for vm management, but I'd like to get full control back.
A reinstall would be a real pain, so I'm hoping there is another solution.
Any help would be apprechiated.
Some more screenshots (sorry that they are in german, I hope the relevant information is language independant):