Windows 10: Small black, red and white squares on win 11 wallpaper

Hi,I have Small black, red and white squares on win 11 wallpaper. They dissapear after restart. It happend 2nd time to me already.There are nowhere else but on wallpaper

:)

 

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.

 

I have an "icon" that appeared on the desktop, it is a small white square with a red circle with a red line going through it

original Title: Desktop display

I have an "icon" that appeared on the desktop, it is a small white square with a red circle with a red line going through it

under that is a gray box that says Cloudy 45 degrees shows hi and low and Washington as the location

Right click on it and nothing happens. Cannot drag it anywhere. Cannot delete it.

How do I get rid of it as it is in the middle of my screen?

 

wallpaper small red star hack?

Anyone know anything about small red star apear on desktop wallpaper?

sudden my desktop just change itself with small red stars. I never see my wallpaper change itself before. could this be some kind of hacking activity?