I have a spare HP laptop that is only used for Windows Media center to record TV shows and for web surfing. Windows media center started having stuttering video and audio/video out of sync. This problem was with both live and recorded TV. I reinstalled windows 7 32 bit home premium SP1 from a windows 7 with SP1 disk and windows media center worked fine. I installed AVG antivirus, opera, chrome and did all of my normal setup stuff (no other software since this is only for tv recording and web surfing). Media center still worked fine. Then when I did windows update, the problem returned. I used restore points to roll the system back and I am now fairly certain the problem is caused by update KB976902. Unfortunately this is the very first update. When I first run windows update it says windows update itself needs to be updated before I can get other updates. It doesn't tell me what update number but it seems to only install KB976902. After that it offers me 95 more critical updates, but media center already does not work. Thus my choice is to never update windows 7 from SP1 or to find a way around this update. I can go without updates since there is nothing important on this computer but I am nervous about that since it is on my home network and I transfer the recorded shows to my work laptop for travel. Googling this update reveals it was called the black hole update and that it may have been superseded by another update. it also says it is a prerequisite for SP1 but I am getting it after SP1. I have checked My Computer properties to verify SP1 is installed. Does anyone know how to get the updates without messing up media center? I have set a restore point so I can do some experimenting. this update appears mandatory before I can get any other updates.