SYMPTOMS: Watching TV on Media Center - the video (not the audio) pauses 3/4 second, plays 3/4 second, pauses 3/4 second - continuous loop. The bottom 5th of the screen is solid green (a rectangle at the bottom extending to both sides). If I play previously recorded TV in Media Center (from when this wasn't happening), the recording plays perfectly. I recorded a 1/2 hour TV show with Media Center minimized (so it wasn't trying to display it), and I got 1/2 hour of that continuous pausing with the green when I played the recording. I can play DVDs perfectly from Media Center. If I use Pinnacles TV software, I can watch TV okay. (But I don't use that - I like Media Center - the program guide, program search, recording options, and the fact the the Windows IR blaster will change the channels on the DirecTV box automatically.) WHAT CHANGED: I got a new motherboard and graphics card. (My old motherboard w/onboard graphics fried a second memory chip in 4 months - so it got canned.) Motherboard: Intel Desktop Board DG41RQ; 2.7Ghz Dual Core Intel; w/2GB ram. Graphics Card: EVGA GeForce 9500 GT (PCI) (Nvidia GPU w/1GB memory) There are no yellow ?/!'s in the Device Manager. I'm still using the Pinnacle PCTV HD PCI - TV tuner card. The DirecTV cable goes to it. O/S: Windows Media Center (2005) w/Update Rollup 2; Window XP Home SP3 w/all updates. The Microsoft Windows XP Video Decoder Checkup Utility still reports Cyberlink is the preferred decoder. No new decoders are on the list after installing the graphic card's software. WHAT I'VE TRIED: Uninstalling/reinstalling - Media Center Update Rollup 2, the graphics cards drivers, the Pinnacle drivers, and PowerDVD 8 (the Cyberlink video decoder - I verified it was off the list in the utility before reinstalling it). Changing video settings in Windows and on the Nvidia control panel. Hours and hours of Googling.