Hi, Any help with this problem would be greatly appreciated. I installed the 64 bit version of Windows 7 premium yesterday. It's an upgrade version but I did an install from scratch rather than an upgrade install. I had hoped that this would solve the problems I'd been having trying to watch TV with Vista. I ought to have known better. What happens is that I select Live/TV or Recorded TV in Windows Media Player or insert a DVD into the drive and it starts playing OK then after a few minutes everything stops. The computer won't respond to remote control, mouse or keyboard so I have to use the power switch to turn off the computer. I think I have the latest drivers and bios installed for motherboard/graphics card/sound card. There don't seem to be any events logged that correspond to this so I'm baffled. The system details are: The computer details are: processor : AMD Phenom 11 x4 940 300ghz Ram 4GB M/board: Asus M4N78 Graphics: NVIDIA GeForce GTS250 1GB Soundcard: Creative SB XFI TV card: KWorld PC160-2T TV signal is from a rooftop aerial O/S Windows 7 Premium 64-bit TV : Sony KDL40V4000 Thanks.