some key board keys on my laptop not working.pls help

nazeeha

Honorable
Aug 2, 2013
4
0
10,510
i re install all driver and windows7 as well but still some keys nt working.i used the tdskiller as well but no improvement.now i am typing via onscreen key board.i already had kaspersky anti viruspls help
1.not working keys :-8,o,r,1.2,3,u and 0
2.model no :-np300e5a-a01dx
3.brand - samsng
4.operating system - windows 7