Wipe up the WinSxS Folder in Windows
In Windows 7 and Windows 8/10, there is a new folder under C:\Windows called WinSxS, which basically stores dll and component files. It also stores older versions of all dll and component files and can grow to be quite large. In addition to that, a lot of space is taken up by the backup folder, which gets really big after you install a Service Pack, like SP 1 for Windows 7. Here’s the size of my WinSxS folder on Windows 7:…