HP dv6000 Vista re-install - PC not recognizing networking hardware

I did a reinstall on a friends PC. He is running Win vista, 64 bit. Once the reinstall was complete the PC would not recognize the networking hardware. I have tried reinstalling the drivers from the HP site, but none of these seem to work. Any suggestions? Would like to try downloading them from the manufacturers site, but don't know who makes it. Please help!!! Thank you!!