As I was going to bed last night, I started to shut down my computer and noticed the Shutdown button had the emblem on it indicating that an update was available for the computer. I let it update and went to bed. When I tried to use the computer today, it let me login to my profile then froze after about a minute. The next time, It froze after a minute and the display showed random coloring, and the time after that, it simply didn't transmit anything to the monitor, so the monitor went to power save. I have successfully gone into Safe mode w/ Networking and have been able to surf the web, download Spybot S&D and it hasn't solved anything. It still gives me funny colors after login. Have tried removing memory, dusting out the computer, and even system restoring from a day before to a week before and still nothing.

Computer Speccs:
Microsoft Windows XP Home Edition Service Pack 2 (Build 2600)
Intel(R) Pentium(R) 4 CPU 3.20GHz Model 2, Stepping 9
Memory: 3072 MB
Graphics Card: PNY NVidia GeForce 7600 GS 512MB DDR2