Windows 7: HD air recorded content playback

First I want to thank whomever started this website. This is first I found searching for Windows 7 Media Center folks.

I am testing Windows 7 beta only for its media center enhancements. I have a seperate PC dedicated to Freeair Digital TV +HD, this box is my PVR. I do not have cable. Vista MC had no trouble playing back any content, but the one issue I am running into is that some HD recorded content will not play back. I get the following error(within MediaCenter):


VIDEO ERROR
Files needed to display video are not installed or are not working correctly. Restart windows media center or restart the computer.

This is the only issue I am having with my setup. I am not really sure where to start since my Vista MC had no issues w/ this same function.

I have a Radeon 3450 HDMI running video and sound over HDMI, and a Pinacle 800i HD tuner card.

PS - Does anyone know if you get the QAM channels if you only subscribe to comcast's internet service?

Thanks a bundle all, and I will be back!

I have a Radeon 3450 as well, but cant seem to find drivers that work with windows 7 (vista was fine). When I download the latest I get an error on my tv that the signal type is not supported. If I disbale the drivers I can at least get in without going to safe mode.

What drivers did you use or what settings did you make for Windows 7?

You need to re-run WMC setup after installing driver packages, many include codecs and filters. Did you? Make sure you update your HD audio drivers also.