Unlocking and Removing Read-only


I am trying to unlock and change the status from read-only of my wp-config.php files so I can make an update. However, when I follow the instructions to unlock the folder I get a message that it is read only and when I try to change the status of read only, I get a message that it is locked.

I do have the option to work from a Duplicate, but when I change the duplicate locally and try to upload it, it will not upload to my files.

Any suggestions?