How to remove the Windows.old folder that is generated when you install Windows 7

I am not sure how I got this 2.2 GB folder on my “C”  partition but it was not necessary. With free space on my “C” partition down to 5% it was time to clean house. The Vista instructions will work as written if you run the Disk Cleanup utility as the Administrator. If you happen to run the utility as a “mere mortal” there is a button in the Windows 7 version to restart the utility as an Administrator if you want to “Clean up system files”.

How to remove the Windows.old folder that is generated when you perform a custom installation of Windows Vista