All of a sudden all my files have become read-only. I discovered the problem when trying to rotate a picture in photo gallery or through exploere. I received the message "Couldn't rotate ...... it might be read-only or in a location that is unavailable" OR "You cannot rotate this image. The file might be in use or open in another program, or the file or folder might be read-only". I have checked the permissions and the read-only box is ticked, but if I untick this and apply (to either the file or folder) then it does its business but automatically defaults back to read-only. I have run a virus scan (Kaspersky) and ran Malwarebytes and both are clean.
Please can someone help me.