I have an ATI 3450 and am running XP pro. I have had my computer built now for a few months and it has been working smoothly. I use my main monitor for e-mail and the 2nd monitor for watching video files. Up until recently everything worked fine but I was beginning to get frequent BSOD's that would endlessly loop. I pulled out a stick of ram to see if that stopped the problem (it has so far) but now I can't play video on that 2nd monitor. When I try using VLC player, GOM player, Media Player Classis, and Windows Media Player they all display a black screen. When I drag the video window to the main monitor the picture is then present. What can I do to fix this? Thanks!