Hi everyone, I'm new to these forums, and I desparately need help here... For months now, ive been having horrid computer problems. First I would get random crashes with no bluescreens... So after switching many parts out, It turned out to be the graphics card. I switched, quite temporarily from a GTX 260 to a 9500. When no errors came around, I decided to follow the idea of... 'If you have to replace... Upgrade', and bought a new GTX 275 to hopefully end my headache once and for all.. However, I have been having blue screens of death or random instant shutdowns in every game i have. The crashes occur totally randomly, and I doubt it is an overheating issue. My temperatures are quite acceptable with both CPU and GPU. The Bluescreen error I always get is nvlddmkm.sys, which leads me to believe it is a driver issue, but, I have not been able to fix this issue no matter WHAT. The last thing im considering is replacing the motherboard, as it is the only thing in my computer which hasn't been replaced or tested continuously. I am TIRED of blue screens and horrifically random crashes. Please help me if you know anything about my issue. I am desperate to make sure that my computer isn't just an expensive Brick... Specs are as follows. Intel Core 2 Quad Q9550 4 gb RAM MSI GTX275 WD Caviar Blue 640 gb HDD Ultra X3 1000w PSU ASUS P5N-D NINE fans.