Oh? It was a EtherExpress Pro based thing? If so then yeah, it should have worked without any problems.

Missing hardware drivers for Windows is sometimes a little confusing. Windows will know that some sort of device doesn't have a driver but it won't actually tell you what it is since it doesn't have the driver in the first place.

The CD that came with the motherboard should have versions of all the drivers you need. Assuming you made the PC yourself or the PC builders gave you the disc...