back in the 3.11/95 era when doing troubleshooting of slow PC's I would always change the bitmap wallpaper to a solid color. nothing more painful then watching a slow machine waste resources trying to render a desktop background.
Later on...
"Why did Windows 7, for a few months, log on slower if you have a solid color background?"
https://devblogs.microsoft.com/oldnewthing/20250428-00/?p=11...
Later on...
"Why did Windows 7, for a few months, log on slower if you have a solid color background?"
https://devblogs.microsoft.com/oldnewthing/20250428-00/?p=11...