I recently setup a new PC with Windows 8 Media Center using a Hauppauge 2250 dual tuner card. This same card was moved from my old Windows 7 w/media center PC and was working correctly. It appears that I'm not able to have both the analog AND digital channels configured at the same time. When I go through the setup and let it automatically configure the card it will see it correctly (Analog and Digital), go through and scan the digital channels, but will not show analog channels in the guide, and I can not add them manually. If I go through the TV setup and only select analog I can see all my analog channels, but same as before can not add the missing channels as it is only looking at either the analog or digital tuner, under Windows 7 this wasn't an issue.
Apparently this was an issue in Vista and was fixed in a Service Pack, and was not an issue at all in Windows 7, but appears to have crept back up under Windows 8?