I recently upgraded to Windows 7 to get the Media Centre for recording TV. I used to use MediaPortal on Windows XP but the scheduled recording was unreliable. The recording in MCE is great but when I watch back the sound soon starts to degrade and become what I can only describe as "bubbly", i.e. sounds like the speakers are under water. The effect seems to get worse the longer the video is running - it might start off OK but become unbearable after 5 minutes. I've checked for the latest video and sound drivers and they are all current. I am able to watch old recordings on VLC fine, but the same .ts file on Media Player does the "bubble effect". Apart from this system performance is just as good, if not better, than when XP was installed. I've also increased the memory from 1 to 2GB but that didn't make any difference. I'm using Windows 7 32 bit with AMD Athlon 64 3500+ processor, ECS motherboard with NFORCE-A939 chipset and GeForce 6600 graphics. Any tips as to what I should be looking out for?