1) Check the Device Manager
The first step of troubleshooting a network card or USB controller is to check the Device Manager. To do so, go to the Start menu and type “Device Manager” in the search box. Once the Device Manager window opens, look for the network card/USB controller in the list. If the device is listed, then it likely means that the drivers are installed correctly and the device is working properly.
2) Check the Network Card/USB Controller Settings
If the device is listed in the Device Manager, then the next step is to check the settings of the network card/USB controller. This can be done by right-clicking on the device in the Device Manager and then selecting Properties. In the properties window, you should be able to adjust various settings of the network card/USB controller such as the speed and duplex settings. Make sure that all settings are correct and then save any changes.
3) Update Drivers
If the settings for the network card/USB controller are correct, then the next step is to check for any available driver updates. Driver updates can be found on the website of the manufacturer of the device. Download and install any available updates and then restart the computer. This should resolve any issues caused by outdated drivers.
4) Replace the Network Card/USB Controller
If none of the above steps have solved the problem, then it is likely that the network card or USB controller has become faulty. In this case, the best course of action is to replace the device. A new network card/USB controller can be purchased from most electronic stores or online. Once the new device is installed, the issue should be resolved.
5) Reinstall the Operating System
If the issue still persists after replacing the network card or USB controller, then the last resort is to reinstall the operating system. This will replace any corrupted files and help resolve the issue. To do this, insert the installation disc or USB drive and follow the on-screen instructions. Once the reinstallation is complete, the issue should be resolved.