Alt-Tab problems

Do you have a question? Post it now! No Registration Necessary.  Now with pictures!

I use Alt-Tab to switch between windows.   A few days ago, it quit
working.   Instead of switching windows, Alt-Tab would produce a list
of hotkeys.

It became hard to switch windows.   Even clicking on the taskbar tabs
was problematic.  Clicking on the tab for a background document would
cause the tab to flash orange for awhile, which would seem to be an
alert of some kind; then, once the flashing quit and the tab was a
steady orange, another click would minimize the window; and at that
point another click would restore the window and bring it to the front
so you could work in it.

This was such a problem that we were about to reload windows vista---
but suddenly things went back to normal.

Can anybody say what caused the problem, and what we should do about
it next time?

Site Timeline