I've been watching DVDs on my PC fine for a while until i downloaded a program called Xmpeg 5 to compress and make backups of my DVDs. It worked fine the first time, but now my PC has become really unstable and seems to randomly shutdown and reboot with a message saying "windows has recovered from a serious error" after it reboots. Also whenever i now try to watch a DVD (from the disc) using realplayer i get loads of red and blue pixels spoiling the picture. Has anyone else had any experience of this? or have any advice for me? This PC is only 2 weeks old today and I'm hoping i dont have to take it back!

just a bit of extra info i thought might be relevant: Still get the red/blue pixels when i use windows media player (9) graphics card is 128MB nvidia Geforce 5200 shutdown only seems to happen when i'm doing something memory intenvive (like encoding a DVD!)