Windows 10: Why am I seeing white squares on my computer screen?

Hello,I did a factory restore of my laptop last week and ever since I see white squares, slightly rounded, on my computer screen, in the background. It kind of looks like a keyboard but only with white squares and I see them not only on Edge but also when I'm on my Microsoft Word documents. I can't remember if the factory restore was from the cloud or local.They're very annoying and weren't there earlier, or with any of my other laptops.Can anyone help?Thanks,Daffy D

:)

 

Small white square on screen

I have recently noticed a small white square on the bottom right of my laptop screen. I have absolutely no idea what that is or how to take it off. Here is a print screen.





This little white square is not on the top of everything on the screen. If, say, I click on the notifications button, we do not see the square





Any idea of what that is? Or how to get rid of it?

If it is relevant, on the tray I have:

• CCleaner
  
• Acer Care Center
  
• GeForce 920M
  
• Avast
  
• NVidia GeForce Experience
  
• Avast SecureLine
  
• Drive File Stream
  

My computer is an Acer Aspire E15 with Windows 10, 64 bits.

 

White square on lock screen

Hi, I have a minor problem that I'd like to be fixed. Whenever I put my laptop to sleep for a long time by closing the lid, then opening the lid to wake it up. I get this big white distorted square as my mouse cursor and it goes away when I drag up the
picture screen when you wake up a windows 10 computer, to type in my password to get into my account. What can I do to rid of that white square?

 

White square on lock screen

The issue has resolved itself. I changed the background picture the screen that appears before you input the password and now the white square issue seems to be gone.