keyboard problem

My keyboard is not typing right characters , that is instead of A it is typing V and instead of V it is typing A.

Thanks

Could be various things.

Is the language selection correct?

Did you spill something on it?

Have you tried unplugging it, inverting it, and shaking the crap out of it? (or vacuuming it)

Test it on another computer?
to see if its isolated to the keyboard or the computer?