Two days ago I just upgraded a laptop to Win 10, and for the sake of space saving (about 24 GB), I removed the "windows.old" http://www.tenforums.com/tutorials/

Two days ago I just upgraded a laptop to Win 10, and for the sake of space saving (about 24 GB), I removed the "windows.old" http://www.tenforums.com/tutorials/2066-windows-old-folder-delete-windows-10-a.html http://www.tenforums.com/tutorials/2066-windows-old-folder-d... Now I regret cannot revert back to 7, without formatting. :(