|You probably installed the "drivers" the wrong way. |
Usually when the network adapter is NOT built into the computer's mboard, you install the software for it BEFORE you first plug it in.
Unless the instructions for installing a device tell you otherwise....
You DO NOT install drivers for a device while booting into Windows, if the software for the device has not been installed yet - when Windows detects a generic device or New Hardware while booting, you allow it to search for drivers, it doesn't find any, and it wants you to show it the location of the drivers - CANCEL that, continue on to the desktop, and install the software for the device using the proper installation from a CD or the proper installation file that you downloaded from the web.
The same applies no matter when Windows finds New Hardware !
If you DID install drivers that way,
(The following also applies if you want to un-install previous software, or re-install the same software)
- go to Control Panel - Classic View - Add/Remove Programs and Un-install the software you installed, reboot, DO NOT install drivers while booting, let the desktop screen fully load.
Install the software properly by running the proper download you got from the web, or if you have the CD that came with the card that's in a slot, or if you have the CD that came with the brand name computer that has the Drivers on it, run the software installation from the installation program on that.