Hi, I'n new in the forum but I've been searching previous messages with my problem. Configuración: Desktop: Compaq Presario SG3309LA O.S. - Windows 7 SP1 32btis I'm triyng a solve constant BSOD a user was complaining about. The PC originally came with WinVista, but we installed Win7 Prof. Initially everything was ok, but 3 or 4 months ago the user started to complain. I've had the PC for 4 days now and it randomly crashes even without running any progrman. I've tried reinstalling WinVista and the crashes kept coming. I even tried running Ubuntu from a CD and once it crashes. I've checked the memory with MemTest86+ and everything is ok I've checked the hard-disk with the Hitachi Utility and everything is ok The problem doesn't ocurr in safe mode, only while running a normal mode. I've tried installing a video card instead of the integrated one and the problem still ocurrs. I really don't have a clue what's going on. I'm attaching a couple of minidumps to see if you can help me with this.