Another thing that you could try is testing your RAM. Memory read errors can sometimes be due to damaged RAM. If you overclock your machine and alter the timing of your RAM it could also be unstable even if the RAM isn't damaged.
You could check this program, looks like free memory testing software...
http://www.memtest86.com/
EDIT: Since multiple people seem to be having the same problem I doubt you have bad RAM, but still, couldn't hurt to test it, especially if other programs start crashing on you.