I am having the issue that Win+<> does not snap the windows to the side of my monitor, this is similar to
The Solutions on all these places explain how to (re)enable Aero Snap, but Aero Snap is working for me, i can snap the windows with the mouse (for example), just not with the keyboard. Other keyboard shortcuts (all) work fine, e.g. I can shift monitors using (ctrl+win+<>), so it is a very, very specific shortcut failure.
Of course, I have also tried disabling and reenabling 'SNAP' in “SETTINGS > SYSTEM > MULTITASKING, that does not fix the keys-specific issue. I have tried using the on-screen keyboard and the problem persists.
One possible red-herring is that I recently disabled 'narrator', (capslock +esc), as described here, that is the only system modification i can remember making in the last week. http://answers.microsoft.com/en-us/windows/forum/windows_8-performance/blue-outline-on-everything-i-click-on/cca92fa8-3207-4572-900b-9b6fe5ea0f1c
The keys-shortcut problem appeared completely arbitrarily, without a computer restart or keyboard reinstall or other modifications.