How To Delete Windows 8 Upgrade Download

If you purchase an online Windows 8 upgrade, download it, and then create an ISO file for later upgrade or installation, afterward you'll still have 2.7 GB of wasted space on your system drive. This same problem was reported in the Consumer Preview (see How to uninstall Windows 8 Consumer Preview setup?!) but wasn't fixed. Fortunately, a similar manual process can be used to reclaim the wasted space after the ISO file has been created for the release -- delete these two directories (folders):

1.     C:\ESD
2.     %LOCALAPPDATA%\Microsoft\Websetup