padlocks on folders?

[foxleybob]

I seem to remember there was a way to remove the locks from folders by going into the properties of the folder (I think).
Unfortunately I've forgotten, and would like to get rid of them again.
any help will be gratefully received

Also why have they come back?

 

[Wherewolf?]

Here you go: The File Folders Padlock Icon Explained | Worldstart's Tech Tips And Computer Help

 

[foxleybob]

Here you go: The File Folders Padlock Icon Explained | Worldstart's Tech Tips And Computer Help

Thank you.