When my friend is in game, he randomly starts typing "m" , "g", and "-".
He tried only running the game and no other programs but that dident work.

Any solutions?

http://i25.tinypic.com/kbduv9.jpg

Tell the cat to get off the keyboard!

But seriously, thats a really weird problem and likely his keyboard rather than a problem with the game. Try a different keyboard if you have a spare one, and if not post your system specs to see what can be done.