
If you are also struggling with this problem, Here are some effective solutions help to fix the default gateway is not available on Windows 10, 8.1 and 7.

That result No Internet Access on Windows 10. And when this error occurred on your device then you will not be able to communicate with the outside network. And mostly wrong network adapter settings, problematic Network Adapter Driver (especially after windows upgrade ), Virus malware infection or Security Software cause The default gateway is not available error. In other words, The Default Gateway is that node of your system which forwards packets from your network to outside networks.

A default gateway is used to allow devices in one network to communicate with devices in another network.
