If your Windows 11 PC suddenly loses internet access and troubleshooting points to a “DNS Server Not Responding” error, it can be extremely frustrating. You can see the Wi-Fi or Ethernet connected, but web pages simply refuse to load.
The good news is that this is usually a software or network configuration glitch that you can fix yourself in just a few minutes.
In this guide, we will walk you through the most effective step-by-step methods to fix the DNS server error and get your connection running smoothly again.
What Causes the “DNS Server Not Responding” Error?
Your computer uses a DNS (Domain Name System) server to translate human-readable website names (like google.com) into numerical IP addresses. When your PC cannot communicate with the DNS server, or the server fails to reply, you get this error.
Common causes include:
Corrupted local DNS cache
Faulty network adapter drivers
Incorrect IP or DNS settings
Interference from third-party antivirus software or a misconfigured VPN
Step 1: Restart Your Router and Modem
Before diving into complex command-line fixes, always start with the basics. Network hardware often gets stuck and simply needs a fresh start.
1. Unplug your router and modem from the power outlet.
2. Wait for at least 30 seconds.
3. Plug them back in and wait for the indicator lights to stabilize.
4. Reconnect your Windows 11 PC to the network and check if the internet works.
Step 2: Flush the DNS Cache
Your computer stores a local history of website addresses in a DNS cache. If this cache becomes corrupted, it can block your connection. Clearing it forces your system to fetch fresh data.
1. Press the Windows Key, type cmd, and select Run as administrator.
2. Type the following command and press Enter:
cmd
ipconfig /flushdns
3. You should see a success message: Successfully flushed the DNS Resolver Cache.
4. Next, type this command to reset your IP configuration and press Enter:
cmd
ipconfig /renew
Close the Command Prompt and check your browser.
Step 3: Change Your DNS Server Address
Sometimes, the default DNS server provided by your Internet Service Provider (ISP) goes down or runs too slow. Switching to a public, highly reliable DNS provider like Google or Cloudflare often solves the problem instantly.
1. Press Windows Key + I to open Settings.
2. Go to Network & internet > Wi-Fi (or Ethernet).
3. Click on your active network connection properties.
4. Look for DNS server assignment and click the Edit button.
5. Change the setting from Automatic (DHCP) to Manual.
6. Turn on IPv4 and enter the following reliable public DNS addresses:
Preferred DNS (Cloudflare / Google): 1.1.1.1 (or 8.8.8.8)
Alternate DNS (Cloudflare / Google): 1.0.0.1 (or 8.8.4.4)
7. Click Save and test your connection.
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Step 4: Restart the DNS Client Service
Windows runs a background service responsible for resolving and caching DNS names. If this service crashes, DNS queries will fail.
1. Press Windows Key + R to open the Run dialog box.
2. Type services.msc and press Enter.
3. Scroll down the list and look for DNS Client.
4. Right-click on it. (Note: If the options are greyed out, don’t panic—this is normal in newer Windows builds. If active, click Restart).
5. Alternatively, you can restart it via Command Prompt as an administrator by running:
cmd
net stop dnscache
net start dnscache
Step 5: Update Network Adapter Drivers
Outdated or corrupted network drivers are a common culprit for connection drops in Windows 11.
1. Right-click the Start menu and select Device Manager.
2. Expand the Network adapters section.
3. Find your network card (e.g., Intel Wireless or Realtek PCIe Family Controller).
4. Right-click it and select Update driver.
5. Choose Search automatically for drivers.
6. If Windows says the best driver is already installed, visit your motherboard or laptop manufacturer’s official support website to download the latest version.
Summary
By following these steps—from flushing your DNS cache to switching to Cloudflare or Google DNS—you should have successfully bypassed the “DNS Server Not Responding” error in Windows 11.
If you continue to experience intermittent network drops or slow speeds, check your router firmware or consider testing your connection with a reliable virtual private network to rule out ISP-side throttling.