When typing, every key appears as if SHIFT is being held down.

I ran into a problem where everything I typed appeared as if I was holding down the [SHIFT] key.  This of course was false, and cause all sorts of problems.  Even mouse clicks appeared as if I was holding down [SHIFT] prior to left clicking.

To remedy, I found a simple key stroke combination.

Holding down the right [SHIFT] key, I pressed the [CAPS LOCK] key.  After releasing both keys, everything appeared to be in good working order.