One feature provided by NVIDIA nView Desktop Manager is that it can add some icons to your title bar (just to the left of the minimize/restore/close buttons) to support window roll-up, move-to-next-display, and maximize-across-multiple-displays.
However, when you enable these, you can wind up with some obscure focus problems:
- Sometimes the color-coding of your title bar (that indicates which window has the focus) can be backwards. i.e. It shows the focused color when you don't have the focus, and vice versa.
- If you open an application window, the title bar will show you that it has focus (see problem above), but pressing Alt-F4 doesn't close the window (because it doesn't really have the focus).
I suspect that focus is on the added icons, instead of the real window. If you're a mouse user, you might never notice, but I'm a heavy keyboard user.
- Disable all nView Desktop Manager or
- On the nView Desktop Manager window's User Interface tab, clear all 4 of the Title bar buttons check-boxes.