My computer keeps freezing when I try to run most programs (virus scanners, dvd players, music players, etc.) I can only use messenger and the internet. Everything else freezes, and I can't even do a CTL Alt Delete. I use Windows XP, 1.60 GHz, 768MB of RAM... Anything else you need to know? I could really use some help, I am going out of my mind trying to figure out what to do. Thanks.