In most [[Windows]] systems, a user can open Windows Explorer and find the "Tools" menu. If it is not visible automatically, then pressing the Alt key will usually reveal it. ''This window can also be accessed in [[Windows 7]] and later by clicking the Start button, then clicking Control Panel, then Appearance and Personalization, and then Folder Options.<ref>http://windows.microsoft.com/en-us/windows/show-hide-file-name-extensions#show-hide-file-name-extensions=windows-7</ref>'' | In most [[Windows]] systems, a user can open Windows Explorer and find the "Tools" menu. If it is not visible automatically, then pressing the Alt key will usually reveal it. ''This window can also be accessed in [[Windows 7]] and later by clicking the Start button, then clicking Control Panel, then Appearance and Personalization, and then Folder Options.<ref>http://windows.microsoft.com/en-us/windows/show-hide-file-name-extensions#show-hide-file-name-extensions=windows-7</ref>'' |