Same thing happened to me on WOW with my four year old computer, did a lot of looking, and what I found was that it is a fairly generic message which covers a lot of ground. I finally decided it was the overheating of my graphics card, and had little to do with the drivers themselves.
I had originally replaced all the correct drivers, no change in the frequency of the message. I did get a newer graphics card and that did fix the problem. WOW really tears on graphics cards & CPU.
You might try downloading Process Explorer from Microsoft's Windows Sysinternals: Documentation, downloads and additional resources
. When you run it, it shows all processes active and the amount of resources they use. It shows GPU activity as well as CPU, memory, I/O, etc. Might give you a hint as to how hard the graphics card is working.
I finally just built a new computer with Newegg parts about two months ago. I am a very happy camper now!