Question : Problem: Keyboard Adding Extra Letters and Characters

This morning my keyboard started adding extra letters and characters when I type.  For example, when I type "c" or "z" I get "zc" and when I type "." I get ".\"  I've tried reinstalling the keyboard but that didn't work.  Any ideas how to fix this?

Answer : Problem: Keyboard Adding Extra Letters and Characters

Are you using the Intellitype software?  If so, you may want to try the steps in MS KB258826 .  

Is this keyboard USB or PS2?  Can you provide us any additional information?