hi, i've just been having this problem since a couple of days, at first i chalked it up to XP getting corrupted and after a few reboots and a Last Known Good Config, it seemed to work fine, i even got to play Team Fortress 2 for 3 hours with no glitch. then after i started watching a video file, it started coming up with the BSoD (see title) everytime i would play the file it would BSoD on me. this morning i couldn't get into XP at all, it kept BSing on me. i was convinced it was XP playing up. so i swapped to another older installation of XP on another drive and all went well, then i played the video file again and it BS'ed on me again. so i'm thinking it's not XP it's definitely somethng else. the MS website talks about RAM, so i thought one of the sticks have gone down. after eliminating either stick and the slots, i concluded it's not the RAM, i'm still getting the BS. could a virus cause something lile this and infect both drives? i had both drives in the PC all i did was swap the boot HDD to get into my back up of XP. i'm thinking of using another separate drive and installing XP again and seeing if it BSes on me during the install proceess. any other ideas on what causes this?