Ok, first off it's Vista, so it's allocating a rather gangly amount of room for the OS and all areas of function in addition to it being an IBM Lenovo, which means there's going to be at least a hidden boot partition around there somewhere that makes ghosting the drive next to impossible. IBM is notorious for doing this, second there's way more trash on your drive than what you're seeing.
Right click anywhere in the open area of your desktop and on the drop down menu, click new, shortcut. You'll be presented with a window that asks for the location path of the item that the shortcut is for. In that location, type in the following (copy and paste the following to make it easier!):
%SystemRoot%\System32\Cmd.exe /c Cleanmgr /sageset:35 & Cleanmgr /sagerun:35
EVERYTHING on this list is JUNK that you don't need to keep, check all the boxes ensuring you scroll down to the bottom of the list and click on the OK button. Now if you have NEVER done this before it will take some time to go through. But once you do it, subsequent runs will be that much faster.
You can also try the additional steps listed here -
Keepin' it Clean - Helljack6.com as I've been told by several people that these steps works just as good on Vista as they do on XP, hope it helps.
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