A clean uninstall should not require detective work, yet here we are with folders and suspicion.
Are you also unable to connect to another PC, as the session fails to start or suddenly disconnects due to error code 0x3000008? If so, you are not alone; many users ...
If Hyper-V failed to connect to local computer and says "Hyper-V encountered an error trying to access an object on computer" ...
These Proxmox optimizations saved me from overheating and catastrophic data loss ...