Numeric keys working as function keys

Hello,
I have Sony vaio laptop. When I press numeric keys its perform as function keys. ex : when press 1 key , internet help window open.
When press letter p , opens document saving window

I removed battery n restarted , restored to past day, check on safe mode still the the prob exist.
Tried with external keyboard its performed very well. but I only have prob when use my sony vaio laptop.

Could you please help me to sort this. Thank you...

Erosh