MAN O MAN This is proving trickier than it sounds. $ hrs of attempts and still no luck
1) - No errors in device manager ?
NO "other devices" with yellow ? or ! point.
2) - When I had problem with my Dell Audio, I downloaded Soundmax Integrated Digital from dell and cured my Audio.
3) - Search by Vendor and Device Code.
If you go in device manager, Expand Network Adapters, (or whichever device you need driver for)
Right click properties, go in details for the device driver.
You will see a code like per example VEN_8086&DEV_27D8&SUBSYS...
The VEN code means vendor and the DEV code means device: in this case the vendor is 8086 and the device is 27D8.
Once you have the two codes, go to www.pcidatabase.com.
Enter the two codes and you should get the name of your hardware. From there you can search for a driver download for your hardware.