I know you cannot add a password to a standard folder without a third part program. In the past I've simply used 7zip archive utility to add a password to my zip folder.
However I'm now in a business environment, that is requiring a folder to be encrypted with a password. 7zip is too complicated for normal users, because you can't simply drag and drop files into the zip, because you have to manually re-archive it every time for the new files to inherit the encryption and password.
Is there a free easy way to accomplish adding a password to a folder? I don't mind adding a zip folder, but as long as you can drag and drop the files into there without having to re-archive it every time.