My friends laptop keyboard all of a sudden started messing up. He said when he presses a certain key it will do something completely different. Ex. - When he pushes the i key it types a 5... he plugged in another keyboard and it works fine so what could be the problem?

Have a look in his Regional and Language Options to see if that is still set correctly.

Control Panel/Date, Time, Language, and Regional Options/Regional and Language Options/languages/detailes.

Ok, it's fixed. Turns out he had num lock on.

:icon_scra Are you sure that was it? The numlock shouldn't have any effect on that.