New Dell Optiplex 790 System
Just installed two weeks ago - very few apps installed and only a few trusted websites have been visited.
Originally set up and installed MS Office, Adobe Reader, and a few other common programs. Installed VMware vSphere Client. Upon using VMWare vSphere Client for the first time, I first noticed the white/blank square in the upper right corner of my desktop. It has been there ever since, even when I have not used any applications after startup.
I'm attaching a snippet of the affected area of the desktop.