Issue:
This update provides support for additional set top boxes in Windows XP Media Center Edition. This update only needs to be installed if you are unable to get your specific set top box to work with Windows XP Media Center Edition. If you set top box control is working or you are not using a set top box there is no reason to install this update.

System Requirements
Windows XP Media Center Edition

http://microsoft.com/downloads/details.aspx?FamilyID=3d00ca07-5601-43be-9e33-8b655881b8ea&DisplayLang=en]Download Now