Hi David,

Thank you for your reply.

On Thursday 02 February 2017 18:03:32 Dave Lers wrote:
> Baron wrote:
> > For the past few days I have been getting a "Session locked by
> > user" message with only user can unlock this session.
>
> That could be the screensaver (TCC > appearance > screen saver).
>
> "Below that is a check box labeled Require password to stop screen
> saver. If it is checked, when you click a key or click a mouse
> button to end the screen saver and return to your work, you must
> enter a password."

Thanks, I've just been and looked at that !  The check box is empty.

I did check it and saved then went back and removed the check and 
re-saved, just in case.

I'll see if it happens again on Saturday.  I'm in hospital for the day 
tomorrow.

-- 
Best Regards:
            Baron