For weeks now, my computer has not been shutting down and it has been freezing constantly. I am currently using Windows XP.

When I try to Shut Down the computer, it stays on the
"Windows is Shutting Down Screen"
All day, and it never shuts down. So I have to shut down the computer the manual way, and that can't be good for it.

I Have ran at least 6 different virus/trojan/spyware scans and it found nothing...

Can Someone Please Help Me?

Thank You