One of the first steps in finding a driver is to identify the hardware. Perhaps this program will help (if you're unable to do so yourself):
To find make and model of pc hardware, EVEREST Home Edition
is a free system diagnostics, system information program that will id most hardware onboard a mb. as well as the actual motherboard. It will, in some cases, actually provide a download link for the driver.
Alternate Everest download link: (offers 2 sites to dl program from)
Run the program and then:
Click on Computer
Click on Summary
Right hand window (hardware) if the text is BLUE
this is a link to the web site for that particular hardware.
If you have additional questions or need further help, please post a "copy and paste" of the COMPUTER SUMMARY report (Leave out the Debug–PCI section) from Everest.