Raynor, Bill wrote:
For Lennart's questions: 1. Yes, the problem persists after reboot. 2. The problem only occurs with emacs. For example, if emacs only covers part of the window if I click on the outlook or firefox in the background, alt-tab works as it should. 3. Since the behavior is tied to the emacs window, everything is okay when that window does not have the focus, and after emacs has been closed using C-x-C-c
Could you please try and see if this problem is there if you start Emacs with
emacs -Q
