When you configure Windows Media Center to use a digital TV tuner in Windows Vista, you may lose the Electronic Program Guide (EPG) channel listings for some channels. You may also lose the EPG channel listings for the sub-channels of these channels. Additionally, the recordings that you schedule cannot run.

There is a download that resolves this issue. See Hotfixes for details.

32-bit Download: Windows6.0-KB938927-x86.msu

64-Bit Download: Windows6.0-KB938927-x64.msu

This issue is resolved in SP1.

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB938927.

Microsoft has a way to automatically fix this problem, click the "Fix It" image to go to the Knowledge Base page that contains the download.