I did not know this - Windows "Disk Cleanup" now includes option to remove outdated Windows Update

IMPORTANT:
Search for "disk cleaner" and make sure you choose "run as administrator"


Something new to learn everyday.

Some use "cccleaner" but this one is part of the OS and gets an nice upgrade



Details on How to do it:
http://blogs.technet.com/b/askpfeplat/archive/2013/10/07/breaking-news-reduce-the-size-of-the-winsxs-directory-and-free-up-disk-space-with-a-new-update-for-windows-7-sp1-clients.aspx