If the computer isn’t recognizing the network adapter, it is likely because the device drivers are either corrupted or missing. Device drivers are pieces of software that tell the operating system how to interact with hardware components like your network adapter. To remedy this issue, you will need to reinstall the correct device drivers for the adapter.
To determine what type of device driver you will need, gather information about the network adapter. Take note of the manufacturer and model number. If the adapter is integrated onto the motherboard, you will instead need to take note of the make and model of the motherboard instead.
Once you have the information gathered, you will next need to locate the appropriate device drivers from the manufacturer’s website. Be sure to select the correct version of the driver for the specific operating system on your computer.
Once you have downloaded the device driver, you can install it by running the setup program. This will install the device driver for the network adapter. After the installation is complete, you can reboot the computer and the operating system should now recognize the network adapter.
If the computer still does not detect the network adapter, it is possible that the adapter may be defective. You can confirm this by connecting the adapter to another computer and seeing if it is recognized. If not, the adapter may need to be replaced.
You can also attempt to run a hardware diagnostic test. Certain motherboards come with a special hardware diagnostic utility or tool preinstalled, which can be accessed from the boot menu during startup. If your motherboard does not include one of these tools, you may need to purchase a diagnostic tool from the manufacturer of the motherboard.
If a hardware problem is detected, you may have to replace the network adapter or other hardware components. If no hardware faults are detected, then it is possible that the network adapter is not compatible with the operating system installed on the computer. Make sure you are using the correct driver for the correct version of the OS.
If all else fails, you may need to consult a technician who can provide specialist hardware diagnosis or repair.