You cannot use interactive TV functions in Windows Media Center in Windows 7 (KB2546868)
If you are getting problems using the interactive TV functions in Windows Media Center then we have a hotfix for that (KB2546868)
“Assume that you use Windows Media Center to watch interactive TV on a Windows 7-based computer. You input a correct password in Windows Media Center. In this situation, the mouse pointer and the color settings button do not work correctly. Therefore, you cannot use interactive TV functions. “
get the hotfix and read more about the problem and the hotfix details
Rob
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