Folder winsxs grows with time and may become several GB.
It is a very important folder in Windows that you can not remove. There is a command that clears in this folder but it requires SP1 installed on Windows 7. My winsxs folder was 9GB and after cleaning with command became the 6GB. Does not matter if you have a large disk but if you have an SSD or a small partition for the system, you may want to clear.
The path is
Check out how big the folder is before you run this command.
- Start the command prompt as administrator,
type cmd in the search window, right click on cmd, choose to start as administrator.
- Type the command.
dism /online /cleanup-image /spsuperseded
Spaces before each slash
Valid for Windows 7 SP1