CRAZY KEYBOARD

Hi Guys need urgent help here.

I donno why but all of a sudden my keyboard went nuts.
Nothing I typed came out as it supposed to be. For example Y is now F, U is
now B.
I have checked my regional and keyboard settings and nothing has
changed.This only happened
just over 2 hrs ago.

Another weird thing is that I can only type correctly using Notepad or MSN
Msgr!!
No other application worked. Have tried scanning using norton,
xoftspy,adaware,spybot and nothign has
worked!!

Pls Pls help