drag window

Infopackets Reader 'Paolo' writes: " Dear Dennis, I have a very strange problem. Whenever I drag my browser window on my Dell laptop, I see 2 blue rectangles popping up near the top of the screen (pic). At first I thought this was a Windows 10 ... feature but I have searched Google for the 'dell 2 blue rectangles popup' problem but I cannot seem to find a solution. I have no idea how to shut this feature off but it is very, very annoying. Can you please help? " My response: I have never had this problem before, so I asked Paolo if he would like me to connect to his system to have a closer look ... (view more)