I've noticed this weird problem..
I have Windows XP Professional SP3 (I've had SP3 installed since I installed windows last, cause i slipstreamed it), and every time I go to shut down, i click Start > Shut Down, and then nothing happens. My computer just locks up for about 10 minutes, and then finally starts responding again, but no shut down dialog. This just recently started happening, but I can't think of anything i've installed that would cause this.. and no, I don't have system restore enabled, so I can't do that.
Any suggestions?
-John