DVD playback cuases blue screen

I recently installed a PNY Verto GeForce 9600GT in my Dell XPS 400. I also added in 2gigs of ram (3 total) and a Stealth X Stream 500W power supply to compensate for it.
Now when I try to play ANY DVD in any player it automatically goes to the blue screen saying my system had to shut down to avoid damage, etc. I’ve tried Media Center, Windows Media Player, and CinEplayer.
The driver for my graphics card is up to date as of a week or two ago. Any ideas on what is causing this, and how to fix it? Thanks!

Try VLC Media Player to see if it does the same thing.