Window in Window. 2x Same Document. 1 small (overlay), 1 normal

Hi All,

When i open a .PDF file Acrobat Reader (2019.012.20034) shows the document 2 times. 1 Small (overlay) and 1 normal window.  This issue shows up since about a week. System: DELL laptop running WIN10 Prof. with 4K screen.

I reinstalled acrobat reader without success.

Help is appreciated!

Thanks,

Rob

UPDATE : I discovered the following. When i connect an external display to my laptop and move Acrobat Reader to my external screen the overlay window disappear.

When i move it back to my laptop screen the overlay window re-appears.

It seems that Acrobat reader doesn't interpret the MS-Windows 10 screen environment properly