If your lappy has Intel graphics only, google "Intel HD graphics driver".
If your lappy has Intel graphics and AMD or nVidia, you do the step from above, install those drivers and then go to amd.com or nvidia.com and download the correct driver for your lappy.
If you don't know, you'll have to find out for us in order to help you. Do you have the exact lappy model with you?
Cheers!
EDIT: Typos.