What procedure are you following to attempt to pair the headphones with your laptop? If you would give more details we might be able to help you.
In order for your laptop to find BT devices you must follow a specific procedure.
Are you able to bring up the Bluetooth menu and tell your laptop to search for BT devices?
Have you put your BT headphones into discovery mode so they can be found?
It isn't automatic and until you tell us what you have tried, we really can't advise you further.