I have this weird problem which is hard to explain but i'll try.
Occasionally weird things happen and my computer stop responding normally, including:
Task Manager does not work when I do ctrl alt delete...."The application has failed to initialize properly"
Sometimes when I press ctrl alt delete "Windows Security" window comes up with options lock computer, log off, task manager etc (I press task manager here, nothing)
Shortcuts acting weird, eg firefox with "Bad Image" "The application or DLL is not a valid Windows image. Please check this against your installation diskette".
When I click other shortcuts I get "(null) is not a valid win32 application".
When I double click some items on the desktop IE the recycle bin, they don't open but disappear. Sometimes I can't open folders but if I can, the items in the folder have text and icons missing.
"Start" text on the start button disappears.
When I click shutdown the old style menu comes up with "what do you want the computer to do".
I have no idea why it's doing this!