Hi guys, don't post here often, so apologies in advance if I do something illegal. As far as I can gather, I should be posting in the right forum. I've been having system stability problems for awhile, but the system seemed to have stabilised until recently when it started acting up again. Have tried the steps in the sticky above on refreshing the page file. defragging etc. Problem still hasn't gone away. All rams have cleared 7 cycles of memtest at 2.65 volts and 2.6 volts without problems, though everything has been reset to stock already. My system specs are as follows : AMD 64X2 4200+ MSI K8N Neo 4 Platinum 2 x 512mb Kingston CH5 PC3200 DDR 2 x 512mb Mushkin Black Line BH5 DDR Inno 6600GT 128mb Creative Audugy ZS Platinum BenQ 1640 Gigabyte CD-RW Hitachi/IBM 80GB SATA II Western Digital 240GB SATA HD Verudium Vortex 430W Am fairly sure its not a power issue and the core temp never exceeds 49 degrees even at full load. Its about 44/45 idle. Am guessing it might be the soundcard though... Anyone able to help? Would be most grateful for any assistance and thanks in advance.