Computer crashing-- help please =(

[Aroith]

Thanks for the responses. I built this computer myself and I have 1000 w psu. I always watch the temperatures of my hardware. I keep my graphics card always around 60's c when gaming and my processor cooler. I did a memtest and the ram is fine. So i am hoping it is a software problem. I will reinstall windows tonight, hopefully that works! Appreciate the responses. If the graphics card is broken or the psu is damaged is there any tests I can do myself at home to verify it?