I have no idea what happened, but now none of my keyboards are working.
I have an HP PS/2 keyboard that I use on my computer. A couple of minutes ago I stepped away from my computer and when I came back the keyboard wasn't working. It didn't respond to anything I did no matter how much I banged on the keys.
I assumed the keyboard was broken, so I tried a different USB keyboard, but that one didn't work either!
Best Answer
Some time Windows doesn't recognize keyboard, or doesn't recognize some keys. So for that Microsoft provides one s/w that fix it automatically that is called Microsoft Fix it. Use it may be it will help you out. Here is the link:
Microsoft Fix it