Hi, I am new in the forum and I would like to comment what is happening: New computer (just 3 weeks old) Asus A8N-sli premium. Last Bios and drivers AMD 64 X2 3800+ Cooler Zalman 2 GB ram (2x1GB OCZ performance, running in dual channel, latency in auto in MB). No OC. PSU Tacens Valeo Smart 560 W XFX Geforce 7600 GT XXX Latest drivers certified. Sound blaster X-FI HD Samsung SATA 300GB. LiAnLi Case well ventilated, three fans and temp in CPU never higher than 39-40ºC It is not a gaming machine, just DTP and digital phtography under winxp sp2. The problem is that randomly gets BSOD with Pfn-list corrupt message, at least ten times in the last two weeks, even when idle overnight, but most of the times when dealing with large files (opening large photos or decompressing big files or applying updates of acrobat/photoshop). I have run memtest for hours without a problem, testing each separate dimm in the system and always the BSOD. The page file is 6 GB in a separate partition. I am getting crazy about this, I do not know what else to test. Any suggestion welcome and thanks in advance.