I have created a folder with access denied permission. How to lock that permission so others cannot change that? I would like to protect my folder from others.
You can accomplish this by using the deny persmission on your folder. If you do this and a user who is denied access tries to change permissions, they will get rejected - possibly requesting a username/password depending on your setup.
If you want the users the right to use the files, but not modify permissions, you can used advanced file permissions by right clicking > properties > security > edit > advanced