I have a new PC that was working fine until a couple days ago and it started randomly freezing the computer.

Only in WoW. Its always when entering a dungeon during the loading screen, and get an error something like "Unable to load skin". It closes the one window and the rest lock up and I have to force shut down.

Like you I also get the occasional display driver quit working message, it always recovers though. I have an i7-4790K and a GTX 980.