W7Px64 fully updated except W10 nag optional updates. Was just manually backing up data to multiple external hdds. Then started deleting duplicate programs & files. Using Agent Ransack to search files. Tried to go files locations through Windows Explorer, but I couldn't find them. So I went to Control Panel - Folder Options - View. Don't show hidden files, folders & drives was selected. Hide protected operating system files was also selected. I never have it set that way. What happened?