As in Windows XP, Windows 7 and Vista does not include desktop cleanup tool. Desktop cleanup tool keep track of your usage of the desktop icons and offers you to remove the unused one every 60 days.
Thewindowsclub released a portable and useful free tool called Clean Desktop that will help you clean up your unused desktop icons in Windows 7 & Vista.
Just run the tool, it will scan & detect desktop items which have not been used in the last 30 days and list them down.
The unused items are not deleted but moved to a folder on the desktop. Alternatively, you cans also opt to delete the unused items directly.
Clean Desktop Works with Windows 7 & Vista, 32bit and 64bit versions.