How to restore the function keys of vaio

Hello shilpamangesh;

Have you downloaded all the available drivers and software on the Sony support site?

Your 'restore to factory settings' option was on your hard disk.
The only course of action for a factory restore I can recommend is to order Recovery Media directly from Sony.
Check the Sony support site for your country for specific prices.

Trying some of those other recovery services sites leave you open to getting scammed or infected with malware.

Hi thanks for your answer... I did try downloading the available drivers and software but there are so many unsure which one to download and in which order...