No network connections available and no network adapter in device manager (windows 7)

Originally Posted by TerryNet (Post 8839230)

Sounds like the ethernet somehow became disabled in the BIOS, or it is loose or is defective.

I'm not much of a hardware type, so I don't know if there is a way you could have installed the new card in a way that would cause the ethernet to not work (but not be defective).