Windows 7 - Laptop keyboard acting strange~ Please help

Hello,
So my keyboard has been fine for years but all of a sudden it started to act strange... Some key I press would have numbers with it. Like my "R" key will type out "0r" and only a few other keys are like that and my Space bar types "4"s. My number lock isnt on and I dont see any strange programs running.
If I type "R" and it comes up as "0r" I can go and delete the 0 but come on, I really cant be doing that all the time.
A virus scan showed up nothing. Im stumped. I have no clue whats wrong.

Has any one experienced this before or does anyone know how to fix this?

Thanks

i have been having a simmalar problem with my laptop did you try pushing the key that says Fn?

If that dosent work i have found that a usb keybourd will work when laptop one wont.

Hope this helps