For those who have not, the folder is situated at C: \ Windows\ Winsxs and has. I' m using Windows 7 64bit Premium for two years now and in this time my C: \ Windows folder has grown to almost 30GB which is, in my opinion, inacceptable.
The biggest subfolders are winsxs ( 10. Moving the WinSxS is not advisable because doing so can severely break your system. In short, Winsxs, which stands for ‘ Windows Side By Side’, is Windows native assembly cache.