You said during 3d gaming time right? (what 3d graphic card you have?) well, i play Morrowind "(which takes a hefty amount of graphic memory), i get alot of STOP errors until i did a few tweaks and updated all my drivers. BTW: Windows XP SP! is my OS. "Remove write combining Way to fix: Right click on desktop->properties->display->advanced->troubleshoot Restart when prompted" One possibility "Lower the pagefile" Another possibility