I just ran into an unusual problem at work today. One computer won't accept input from the F9 key. I tossed another keyboard onto the machine and rebooted and it still didn't work. I tried with a ...

The Fn key is short for function – this particular key allows PC users to access the second assignment of a key. It is normally found in the bottom-left corner. The Function keys (F1, F2, etc) are ...