I have marked one of my folders as hidden and now when I go to Control Panel> Folder Options and tick on SHOW HIDDEN FILES AND FOLDERS, it doesn’t show that any hidden files. Another issue is that when I go back to Folder Options, I see the tick has automatically switched back to DO NOT SHOW HIDDEN FILES AND FOLDERS. It also doesn’t work and respond in the same way when I simply click on APPLY without OKing that.