I just updated my Video card, ram and hard drive. Now I don't have any video playback. I could play all types of videos before the upgrade. Now all my video players (WMP, RP, & QT) freeze and eventually stop responding when playing any format (avi, mpeg, mov, wmv...) I can play music on all players and they show graphics, I can also play videos off of Youtube. I could play World of warcraft until this morning. Now it crashs sporadically giving me a memory failure. I'll crash it again and post the message if someone thinks it'll help Here's a list of whats in my CPU. Video card = G-force 7800 (agp) Hard drive = 250g IDE Hard Drive = 500g Sata (Via Sata card) 500w power supply. I have no spyware or viruses. according to Trend Micro 2007 and Webroot 2007. I just traded out Video card thinking I had a bad one I also remove an old hard drive thinking that was the problem. If anyone can shed some light on this problem I will be eternally great full.