This update has been released by Microsoft on 22nd July,2008.

Install this update to resolve an issue in which a Windows Media Center configuration that uses an analog TV broadcast without a set-top box, displays a protected content message when recording television shows. After you install this item, you may have to restart your computer.

Supported Operating Systems: Windows Media Center 2005 with Windows XP Service Pack 2; Windows XP Service Pack 3.

http://www.microsoft.com/downloads/details.aspx?FamilyId=D8010CD4-1AB3-495B-87E8-D18FD3785D91&displaylang=en