A transparent box has appeared on the screen of my Swift 1 and my cursor won't work over that area

Flossy1

A transparent box has appeared on the screen of my Swift 1 and if my cursor is hovering over that area of the screen it always goes onto the circle (like the egg timer) showing it is busy.
This happens whichever page/browser/desktop I'm on so I think it's an issue with the screen. Initially I thought it could it be something like a chat box hasn't shut down properly, but I've checked task manager and there is nothing running apart from Edge  & Chrome.  This has been happening for a while so shutting done doesn't get rid of it.
It's really frustrating as I can't click on anything on webpages if the button or link is in that area of the screen, which it often is!  
Thanks in advance if you can help

billsey

Try booting in Safe Mode. That would remove the possibility it's an app running wild in the background. You could have an area like that with a touch screen or the touchpad, but it would be extremely unlucky for it to affect all input devices at once.

Flossy1

Thanks Billsey I'll give that a go   

billsey

Any results yet?