Wierd video card issueFollow

I came across a very odd crash earlier this evening in WoW. My VPU stopped accepting graphical commands and froze up in game. ATI gave me crash reporter so I could send the data to them (which I did). The oddest part about the crash was that I could go to the sign in screen for wow, get the loading screen, and then it would crash trying to load the environment. I thought the login screen used the same graphics core as the game. Anywho, I reboot the computer and logged in just in time to see my character get wiped by 5-6 creatures >.>

System wise, the only thing I did yesterday was install my Epson drivers (from cd) so I could print something out.

Specs:
MSI K9AGM-FIH AMD 690g chipset
ATI Radeon HD 3870 OC 512mb
1024x2 MB DDR2 800mhz (Corsair)
On board sound
Epson RX580
250gb SATA HD
160gb SATA HD