[Shell]
Command=2
IconFile=explorer.exe,3
[Taskbar]
Command=ToggleDesktop

Save the following file as “Show Desktop.scf” and drag it back into the quick launch toolbar. That’s it!

More:  The Quick Launch toolbar uses the files in the following folder:
%userprofile%\Application Data\Microsoft\Internet Explorer\Quick Launch

If you play movies or music from your computer through your Xbox 360 you have the computer setup as an XBOX extender.  Over time as you add new content to your computer the Xbox 360 may not update with the new content. To fix this you simply log into your computer in question and bring up Windows Media Player and select Oragnize > Apply Media Information Changes.

Once you have done that your computer (Xbox 360 Extender) will begin to update the library.

Once the progress bar hits 100% your media will be updated and you should see all of it on your Xbox 360.

For more info on setting the Extender up, here are the instructions from the Xbox 360 web page.

Connect your console to Windows Media Center

Before you can play content from Windows Media Center on your Xbox 360 console, you need to connect your console to Windows Media Center.