How to download sound driver for dell laptop

Go here - select your Dell Model
http://www.dell.com/support/drivers/us/en/19/DriversHom...

 
hey i don't have the sevice tag......


how will i no.....
 

Service tag is sticker somewhere on your machine.
It should also be displayed in F2 setup.

There are other ways on dell.com to get drivers other than service tag. Use other options on their site. Drivers are free, and service tag is only good thru warranty period anyhow.