How to Fix a "DNS Server Is Not Responding" Error on Windows
DNS servers’ unavailability causes your Windows PC to display a “DNS Server Is Not Responding” error. Various items can cause your DNS servers not to work. Luckily, it’s easy to fix many of those items and resolve your problem. Here’s how to do just that.
Disable Other Network Connections Panel Network Properties Disable Internet Protocol Version Network Adapters Your Network Adapter Drivers Internet Network
Source: howtogeek.com