I recently got back into Virtual Machines and found the performance terrible on Windows 11.   

I couldn't figure out why.  There was noticeable input lag and even moving windows around was sluggish.  

I looked on Reddit and elsewhere and got advice about installing tools or configuring the VM differently but eventually just had a feeling that it had something to do with security on Windows.  So after a lot of trial and error I found this option:

Now, I am not recommending you disable this.  But on my home box, that is behind firewalls and I am using myself in relative isolation, I felt comfortable turning this off when doing VM work.  Doing so brought VM speed back to where you would expect it.

Hoe this helps.