Vista 32bit on Aopen EPC945GT-m8 using onboard GPX and 2GIG RAM + Hauppauge WinTV-NOVA-T-500. Is this problem related to poor signal? When changing channels - media center is slow to change channel. Once the channel has changed, media center skips frames and takes a few seconds to catch up. Is this to be expected with Media Center or should channel changing be instant with no picture slow down? Having not used MC before, i don't know what to expect. If this problem is not signal strength related - any suggestions?