Sound driver

how to get a sound driver to my laptop

Generally you download drivers from the manufacturer’s site. Or if you know who made the sound chip for the motherboard, you can get drivers from the people who supply those chips…examples being Realtek or C-Media.

Who made your laptop and what is the model number?

Generally if you take the precaution of connecting a NIC cable to the computer
while the OS installer is running AND allow automatic updates to run your computer will often find all the drivers all without human intervention.