Unknown item on screen

Arthur, Have a look @ this link (https://support.avg.com/answers?id=906b0000000D3bGAAS).
AVG Guru


A small window has recently appeared in the bottom right of my screen,
And I can find no way of clearing it. I've used AVG 2015 Free version.
 
Its title is:
 “Fix common PC problems”
 
Below that is the text:
 
“Reduce problems with your printer, scanner,
Sound or network connection.”
 
There is no hyperlink.
 
A full computer scan with AVG 2015 free version, did not find this error.
 
I would be most grateful if you can suggest a simple solution.
 
Be as technical as you like, I have been using computers for over 30
years – since I was 60!
 
Arthur HC Williams,
Cairns,
Tropical North Queensland, OZ.
 

Arthur, Have a look @ this link (https://support.avg.com/answers?id=906b0000000D3bGAAS).
AVG Guru