SAME PROBLEM as original poster.
Windows 11Pro VS 24H2
10.0.26100 build 26100.2605
Running Fences 4 - 4.2.2.1 now - BUT - I downloaded Fences 5 last week, & it created the same problem
Problem was also occurring with Windows 11 previous version
Background is a solid blue color -no graphics
I have screen shots of the problem, but don't see a way to upload them here
UNINSTALLED FENCES 5 - PROBLEM STOPPED COMPLETELY
Reinstalled Fences 4 - PROBLEM STARTED AGAIN
Rebooting Laptop several times daily stops problem for a few minutes.
Hope you can fix this bug - I've been using Fences since 1.0 - hard to work without it.