I have a XPS 8700 desktop. The following problem first appeared on Windows 8.1 and continues now on Windows 10.

When I open an app (any app really - Outlook, Chrome, anything), it works fine. Frequently, though, after a period of inactivity the app minimizes. It is still active in the taskbar, but if I click on it I am unable to re-enter the app or start any others. I can close the app (by either hovering and clicking the "X" in the upper right, or right clicking and choosing "Close Window"), but I can not restart it. Subsequently any app I try to start will become active in the taskbar but I will not be able to access or maximize it. The only recourse I have at that point (that I have found anyway) is to restart the computer.