|Hi G4, Google is your friend in such matters.|
You should be able to locate step by step instructions for your laptop and quite likely also a video on Youtube.
However, I would investigate further if the k/b itself causing the problem. e.g.
a) type slowly and if ok, then cause maybe too many programs/activities running
b) THX's suggestion is very good and a must to try.
c) is problem only with certain programs or all programs
Please advise back on progress.
Good Luck - Keep us posted.