Use Disk Cleanup to Delete Old Updates From the SxS Folder
  1. Open the Disk Cleanup tool. ...
  2. Click the "Cleanup system files" button.
  3. Check the box next to "Windows Update Cleanup."
  4. Click OK.
  5. Launch the command prompt with admin priviledges. ...
  6. Enter the command: Dism.exe /online /Cleanup-Image /StartComponentCleanup.



http://www.laptopmag.com/articles/clean-winsxs-folder-to-save-space