We are running a very old program called labcalc, which is a scientific dos program. I have dosbox installed on 5 different computers, and on one of them I get a small white box that appears at the top left corner of the screen, and at the same time I get this message: "The dosbox emulator could not communicate with dosbox". I am not the person that saw this message, so I am going off of what the user told me. The only way to get the white box to go away is to restart the computer. I tried reinstalling dosbox thinking that there may be a corrupt file somewhere, but I still get the same thing.
Any help is appreciated.

adam