About half the time that I try to use the "zero" key, it doesnt work. I have to hit it roughly 5-10 times to make it work, and once i do this... it will work directly after doing this with no problem. Anyone have this problem? Is this something that I can fix myself?
I would reload the OS or update it. Sometimes people trackpads quit working. Mine did the other day and I reloaded the OS an have not had a problem since.