Have you tried using ethernet to connect yet? If it does, then just use that connection to re-download drivers for any "Unknown Devices" in device manager.
If your ethernet does not work, then you will need to do one of the following:
1. Buy a USB Network Adapter (which normally start around $35 for something decent)
2. If you already have the Windows 10 bits on your computer, go back to 10 and download drivers.
3. Use a different computer to download driver installers onto some kind of transmission media (USB/CD/DVD) or,
4. Take it to a repair shop that has these tools