Shift key not working for caps

CA Mehul K. Thakkar (C.A.) (197 Points)

21 August 2013  

in my laptop When i use the Shift key in Word or excel when my caps lock is off  for first time for UPPER CASE Letter when than it works, but for second time it does not work, and i can not write CAPITAL Letter in continuous typing by using SHIFT key.

Can anyone help?