Keyboard Problem: I=3? :f5:

When I try to type something in, sometimes, when I hit a certain key, it gives me something else. Like, hit the "I" key, the computer types in 3. This is playing havoc on my MS hotkeys. Some of the keys function normally (a=a ^.^) but others don't (0= /? wth?). This started ~45 minutes into MS, and I had to stop, as some things were getting impossible (try typing without the right third of the keyboard)

I had to move to another computer to type this. Plz help!