I'll start with system spec's to be sure I do not forget to post them after explaining: Intel Core 2 Duo E8400 @ 3ghz 4GB of RAM Windows 7 64-Bit OS NVIDIA GeForce 9800 GTX+ I also run Dual Monitors, the monitors are the exact same model (which i do not have with me currently and don't think would matter, if needed i can get it) (If need any more info let me know, I'll reply with it asap) Now for the problem... I have been using Windows 7 64-bit without a single problem on this machine since Windows 7 was released. Ever since then I have had no problems doing, well really anything until about 2 weeks ago. I usually play video games on my main screen whilst watching movies/streaming tv on the 2nd screen. The stuttering is constant when watching streaming videos in full screen mode, even when doing absolutely nothing else on my computer. If the video is not in full screen mode it plays fine. If I pop the streaming video out of the browser and F11 it to make it full screen that way it does not stutter at all this way either. I do not believe it to be a bandwidth/internet connection issue though as I also encounter problems when watching movies from my hard drive. The movies from hard drive issue is not exactly the same though. When watching a movie from my hard drive and playing a game the audio and video will skip about half a second every 4-5 seconds instead of a constant stutter. However if I am not playing a game or doing anything else on my computer the videos will play fine. I have updated my video card drivers and the audio drivers as well as bios on my computer but am still having the same issue. Any ideas as to what could possibly be causing this issue and ways to fix it? Thanks for your help, and if you need any other info just let me know.