|I should have said that the Quick Scan of MalwareBytes is good enough - sorry if you went for the full one as it can take ages.|
Assuming your issue is not a virus or malware, please do this:
Set both your screen saver (if any) and background to "None" and see if that helps.
I gather from your past response that you know how to do this. I'm still trying to decide just what this picture is about.
If the picture still appears then do this:
Right click the Start button and select Explorer, which should show your files and folders. The rest depends how you are set up but if there is a vertical scroll bar somewhere push it right up to the top. With luck you will see an entry for Desktop and if you double click it you will see all your desktop icons listed. Let us know if there is anything strange listed and if it has a name please provide it.
Always pop back and let us know the outcome - thanks
message edited by Derek