The problem we encountered was a Windows 10 PC which connected to a wifi access point successfully but did not have any internet access.

Using a command prompt and entering ipconfig /release we got this error message:

An error occurred while releasing interface Wi-Fi : The RPC server is unavailable.

The fix was:

Go to control panel -> administrative tools -> double click on services

click on DHCP client (which was stopped) and click start

After a short time the PC obtained an IP address from a DHCP server and the internet was reachable.

For some reason the DHCP client was stopped even though the PC has been rebooted twice.

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