Hi all, New to the forums but not to Windows. I just recently built a new system as an upgrade from HP Elite m9340f Media Center PC. I bought a new Mobo, Video Card and PSU. I used the HDD, RAM, CPU, DVD, and TV Tuner card from the HP in the new build. My current specs: Gigabyte GA-EP45-UDP3 Mobo Socket 775 intel Core 2 Quad Q6700 2.66Ghz 8MB DDR2 RAM @ 800 Mhz FSB ATI Radeon HD 5770 1GB GDDR5 PCIe x16 (CCC 9.11; Driver Version 8.671 - 11/04/2009) Hauppauge WinTV HVR-1800 (Model 7800, Combo ATSC/QAM) connected to a PCIe x1 slot (Driver version 1.41.27195 - 7/14/2009) Win 7 Pro 64bit (Clean install) Everything works great, except Windows Media Center. I have installed the latest drivers from Hauppauge for Win 7, but when I run MC, the video lags my entire system horribly. Every few seconds the video stops then starts up again, and if i run MC as a window and not full screen, then as my mouse moves around the screen it jumps and skips too. The video performance suffers considerably. I have searched the froums here and on the net, but most of the time this problem is mentioned there is no solution given for it. If anyone has any ideas as to how to fix this it would be appreciated. Joe.