Windows Explorer (and Stuff) In Coma on Win2k

[debugger]

Hi! Just yesterday, I discovered that whenever I tried launching a number of applications (such as Windows Explorer, My Computer, Network Neightborhood, My Documents, Recycle Bin, to name a few) from desktop icons, as well as a number of Windows tasks (again Windows Explorer, but also stuff like Scheduled Tasks) from the start menu, under Win2k, nothing happened. The disk goes for a short while as if it was launching the application, and then nothing. The only way I can, for instance, run Windows Explorer is to do that Win-E thing, or to directly run the executable. Any thought what may have happened? I am fairly confident that I don't have a virus... Thanks. Oops... Just found out that Administrative Tools doesn't run either from the Control Panel... Weird!