I am running W10 Pro 1607 14393.10. This problem has occured in earlier builds.

I have a 2nd monitor that I have set as an extended display. I usually keep Adobe Reader open to view pdf as I work. If I leave my pc and return to enter password, it is not fully sleep - it can just be like 10 minutes. The 2nd screen is blank (shows extended desktop) and the pdf is minimized. This happens with other programs too. When I click on it, it restores to primary screen and then I have to redrag it to 2nd screen. This issue is really frustrating.

Any help appreciated. Thanks in advance.