Laptops do not have internal sound cards. they have audio chips integrated onto the motherboard. Your best bet is to go to the manufacturers web site and download all the driver for your laptop. I would first delete the audio and USB hardware from the Control Panel and then let Windows try to reinstall the hardware and software.
I dont see the audio or USB hardware from the Control Panel. And I already downloadad all the drivers for my laptop. Any other ideas? Is it possible the motherobard is bad? I cant reinstall XP. The laptop doesnt have a DVD/CD drive. I dont know how to restore the laptop back to factory settings without a CD. I pressed F11 during boot up and nothing happened.