Game crashes my pc randomly

I have tried all sorts and i cant find a fix for this.

it started when playing pso2 i would crash once a day and then i would have no problems.

now with NGS i have had 1 or 2 problems since launch but now its every 5 mins.

i have tried updating everything, done a hard drive check. game files check turned off anti virus (even uninstalled it), turned off wallpaper engine etc

also for some reason i cant access pso2 any more i could the other day.

Thanks in advance

Had the same problem, I fixed it by setting my graphic card's OCed vram (which works perfectly fine with other games) back to default value.