I have installed Update Rollup 2 for MCE2005 and now I cannot scan channels properly or use the guide?

Microsoft have released (on 15/10/2005) another update that resolves all known issues with Update Rollup 2 for MCE2005. This update is called "Rollup Update 908250 for Update Rollup 2" and will only be available after Update Rollup 2 has been installed. All of these patches are available from Windows Update. More information regarding this update is available from the Microsoft Knowledge Article Update Rollup 908250 is available for computers that are running Update Rollup 2 for Microsoft Windows XP Media Center Edition 2005.