Half screen mouse

Heres on that I can’t figure out.
When I go Start > Programs > Acc. > System Tools > Benchmark folder > then anything in this folder.My mouse would only cover the lower half of the screen after this. I need to use keys to exit Win98 then restart tofix. This is just the example its also with anything that I have in the 5th from start folder. Any Ideas? Or is this just a limit to Windows. I like to place folders in different places, I like a neater appearance.
Thanks for the Help
Paul