Driver errors

Okay the first 3 GW games i have NEVER had trouble with driver errors. In GW:EN though i seem to be having them in dungeons, primary areas, and it makes it impossible for me to move up anywhere. I shouldn't have to pay more money than just buying the expansion to play it, its ridiculous. I am not rich and it is not my fault my mother doesn't know a thing about thats good on a computer and what sucks. I downloaded new drivers and it seemed to work at first but then i end up having driver errors and BLUE SCREEN OF DEATH even coming up. It's starting to make me very testy.