In Folder Options, click the 'View' tab and, under 'Hidden files and folders', select 'Show hidden files and folders' 'Show hidden files, folders, and drives' on Windows 7. If you want to permanently enable it click the Organize button, go to Layout and select Menu Bar. How you do that depends on your operating system. You may also need to find other hidden files and folders. The operating system hides certain files and folders by default, to reduce clutter and to prevent users who don't know what they're doing from accidentally damaging their system. macos - How to unhide files on Mac? - Ask Different.
