Computer crashes all the time with blue screen
 

Yo,

So I got this new problem with my computer. It has started crashing with a blue screen at random when I play games. For example it keeps crashing in Black Ops 2, Battlefield 3, Alan Wake etc and it only happens after I play for a little while.

Blue screen gives no info on what it could be just says "ERROR at Fx0000.23" or whatever
wtf is wrong with it...