Once you upgrade from Windows 8.1 to Windows 10, there are no listed wireless networks available even if your wireless network adapter is functioning correctly. Restarting the computer or trying to reinstall the wireless network adapter does not address the problem. This issue can also prevent your wired Ethernet from functioning correctly as well, whether the connections are made through a built-in Ethernet adapter or a USB Ethernet adapter.
One known issue is the unsupported VPN software from Windows 8.1 that is not upgraded correctly to Windows 10. It occurs if older VPN software is installed on Windows 8.1 and is present when the older software version contains a filter driver (the Deterministic Network Enhancer).
It is crucial to follow these steps carefully to resolve the problem. Failing to do so can consequentially lead to serious problems if you modify the registry incorrectly. Back up the registry for restoration before you modify in case you run into problems.
- Download the Toubleshooter.
- When you are prompted, click Open.
Note If you receive a security prompt, select Yes to start the troubleshooter.
- In the Window that opens, follow the instructions to run the troubleshooter.
- Open the administrative Command Prompt window.
- Run the following commands:
This issue is set to occur when older versions of the Cisco VPN client and SonicWall Global VPN client are utilized. You can contact your VPN vendor to attain supported software for Windows 10.