Windows 10 VM Now Suddenly Slow

Hey everybody! I've been running a Windows 10 VM on my Unraid server for a year or so and haven't had any problems. Earlier today I upgraded Unraid server to 6.9.1 (it was on 6.9.0 rc, so was overdue). Now that I've done that, I've noticed my VM is running extremely slow. I'm not sure what could have changed, unless there was something in the upgrade that is adversely affecting it. I run the VM on a dedicated SSD which is no where near full. I've made no changes to the VM since

By hansolo77, March 11, 2021
24 replies

So it seems that nested virtualization was causing problems in my case. I reenabled WSL but left off Hyper-V and Windows Hypervisor Platform and everything is running normally. Interestingly, turning off Hyper-V in the Unraid VM settings did nothing to resolve the issue. I needed to disable virtualization features inside Windows itself.