Under the advanced tab in CCleaner there is 'Hotfix Uninstallers'. What are these files? There are 312 mb's worth on my computer.
They are the install/uninstall files for windows update, so if you are having no trouble after updating go ahead and remove them.
Please Note: That after removing the files you will no longer be able to uninstall the updates, in most cases is perfectly fine.
Thank you