Hi Im am new to this so please be bear with me. I have just installed a new GeForce 3d fusion 6200 graphics card to my Dell Optiplex GX 280 (to enable Call of Duty 2), originally graphics was an intel intergrated. No problems with install, installed drivers and COD2 plays no problem. Since install when I install a DVD (default player is Power DVD) it freezes. I installed NVDVD which came with the 6200, still freezes. Video playback from the internet on media player also freezes. Do I need to just tweek something. I have had a look at settings but nothing obvious jumps out at me. Thanks in advance for any help you can give. Mark.