I get a lot of BSOD's and frozen screens (sometimes with sound looping) but it only seems to happen when i play games (WOW, CIV4) or watch something on youtube but never when I just surf around. The blue screen says there is an issue with my display driver and I should check any recently installed soft or hard. I cleaned the dust inside the tower and got a new graphics card , GEFORCE 8400 GS 512MB (it has one of those square coolers, no fan). My previous card was a geforce 210 and the fan was dead so at least it was obvious but now I really don't know what to do. I updated the driver for the card so that's not the problem. I use vista 64 on a intel quad email@example.com with 6gb. Help please? Thanks!!!