I fixed this in my environment. Traced it back to a MSFT security baseline GPO
Computer | Windows Settings | Security Settings | Local Policies | User Rights Assignment | Increase Scheduling Properties.
Thanks dervturbo for the fix!
I'll make it clear what we needed to do to fix it
- Run gpedit.msc
- In an enterprise environment, get your Group Policy admins to make the change for you
- On Windows 10 "Home" edition, gpedit is not available by default
- Navigate to:
Computer Configuration > Windows Settings > Security Settings > Local Policies > User Rights Assignment : "Increase Scheduling priority" 3. Ensure both "Administrators" and "Windows Manager\Windows Manager Group" are in the list. (If they're not, add them. You can copy/paste without the quotes) 4. Reboot
This brings Windows back to its intended defaults (which changed somewhere along the way). Tell your IT admins to reference the highlighted yellow box on this article: