The WinSxS folder is cleaned up after a service pack is installed. (http://www.techrepublic.com/blog/itdojo/reduce-the-size-of-the-winsxs-folder-with-vsp1clnexe

The WinSxS folder is cleaned up after a service pack is installed. (http://www.techrepublic.com/blog/itdojo/reduce-the-size-of-the-winsxs-folder-with-vsp1clnexe-and-compclnexe/1060 http://www.techrepublic.com/blog/itdojo/reduce-the-size-of-t...)