When I turn on the computer, the fn button is some how, I guess activated, and it won't let me input my password as is. In order for the letter to come out, I have to press down on the "fn" button, otherwise if I don't, it'll show up as the little blue number. Is there a way I could fix that?

Some it is

"Fn" + "Num Lock"

Or

"Shift" + "Fn" + "Num Lock"