VPU Recover Error - Radeon HD 4650

This is probably the third forum I've asked for help from so hopefully I'll get this fixed.

I recently just bought an XFX Radeon HD 4650 graphics card which ran smoothly for about 4 months. Now, out of nowhere, I get this error message:

"VPU Recover has reset your graphics accelerator as it was no longer responding to graphics driver commands."

I don't know why this is happening, mostly due to the fact that it ran perfectly fine for 4 months then just completely crashes anytime I try to run WoW or any other game really. It is not overclocked at all and has the latest Catalyst drivers from the ATI website.

Here's my system specs:
Operating System : Microsoft Windows XP Media Center Edition SP3
CPU Type : DualCore Intel Pentium D 820, 2800 MHz (14 x 200)
Motherboard Name : Dell DXP051
System Memory : 3072 MB (DDR2 SDRAM)
Graphics Card : XFX Radeon HD 4650 (1024MB)


Thanks in advance for the help.