Type or paste the path to the Windows Disk Cleanup Utility, this is where Microsoft throws us a curve - the actual file name is "cleanmgr.exe" , so just paste this into the line: "C:\Windows\System32\cleanmgr.exe" or if you prefer you can use the Browse button to select it from the same location.

Now type or paste the name of the shortcut, you'll probably want to use "Windows Disk Cleanup", but you can use anything you want, really.

Tada! Now you have yourself a nice little shortcut right to the Disk Cleanup utility.