How to Fix DNS Server Not Responding on Windows 11 [2026 Guide]

DNS server not responding on Windows 11 blocks your internet access even when your router and connection are working fine. DNS (Domain Name System) translates website names into IP addresses — when it fails, you can’t load any websites.

What Causes DNS Server Not Responding?

• Corrupted DNS cache
• Incorrect DNS server settings
• Firewall or antivirus blocking DNS
• Outdated network adapter driver
• ISP DNS server outage
• VPN or proxy interference

Fix 1: Flush DNS Cache

A corrupted DNS cache is the most common cause — flushing it takes 10 seconds:

1. Open Command Prompt as Administrator (search cmd → right-click → Run as administrator).
2. Type: ipconfig /flushdns and press Enter.
3. You should see: “Successfully flushed the DNS Resolver Cache.”
4. Restart your browser and test.

Fix 2: Change Your DNS Server

Switching from your ISP’s DNS to a public DNS server often resolves the issue instantly:

1. Press Win + I → Network & internet → Wi-Fi or Ethernet → Hardware properties.
2. Click Edit next to DNS server assignment.
3. Switch to Manual, enable IPv4, and enter:

For Google DNS: Preferred: 8.8.8.8 | Alternate: 8.8.4.4
For Cloudflare DNS: Preferred: 1.1.1.1 | Alternate: 1.0.0.1

Fix 3: Reset TCP/IP Stack

1. Open Command Prompt as Administrator.
2. Run these commands one by one:
   netsh winsock reset
netsh int ip reset
ipconfig /release
ipconfig /renew
ipconfig /flushdns
3. Restart your PC.

Fix 4: Disable IPv6

IPv6 conflicts can cause DNS resolution failures on some networks:

1. Open Control Panel → Network and Sharing Center → Change adapter settings.
2. Right-click your network adapter → Properties.
3. Uncheck Internet Protocol Version 6 (TCP/IPv6).
4. Click OK and restart.

Fix 5: Update Network Adapter Driver

1. Open Device Manager → Network adapters.
2. Right-click your adapter → Update driver → Search automatically.
3. Alternatively, visit your laptop/motherboard manufacturer’s website for the latest driver.

Fix 6: Temporarily Disable Antivirus or VPN

Firewalls and VPNs sometimes intercept DNS traffic incorrectly. Temporarily disable them and test your connection. If it resolves, configure your security software to allow DNS traffic on port 53.

Fix 7: Restart DNS Client Service

1. Press Win + R, type services.msc, press Enter.
2. Scroll to DNS Client.
3. Right-click → Restart (if Restart is greyed out, try stopping and starting it).

Fix 8: Run Network Troubleshooter

1. Go to Settings → System → Troubleshoot → Other troubleshooters.
2. Click Run next to Internet Connections.
3. Follow the prompts — Windows may detect and fix DNS issues automatically.

Fix 9: Check Router DNS Settings

Log into your router’s admin panel (usually 192.168.1.1 or 192.168.0.1) and verify the DNS settings. Some routers assign their own IP as the DNS server — if the router has a DNS fault, all devices connected to it will fail. You can also set Google or Cloudflare DNS at the router level for all devices. According to Microsoft’s networking documentation, DNS client configuration at the adapter level takes priority over router-assigned settings.

Key Takeaways

• Flush DNS cache first — it fixes the issue in most cases.
• Switching to Google (8.8.8.8) or Cloudflare (1.1.1.1) DNS is reliable and fast.
• Resetting TCP/IP stack resolves deep network configuration corruption.
• VPNs and third-party firewalls are a common hidden cause.

Frequently Asked Questions

What does “DNS server not responding” mean on Windows 11?

It means Windows cannot reach the DNS server to translate domain names (like google.com) into IP addresses, blocking all internet access even if your connection is working.

How do I know if my DNS is working on Windows 11?

Open Command Prompt and type nslookup google.com. If you get an IP address back, DNS is working. If you get a timeout or “server failed” error, DNS is broken.

Is it safe to change DNS server on Windows 11?

Yes. Using public DNS servers like Google (8.8.8.8) or Cloudflare (1.1.1.1) is safe, often faster than ISP DNS, and can improve privacy (especially Cloudflare).

Can a VPN cause DNS server not responding?

Yes. VPNs route DNS through their own servers. If the VPN DNS server goes down or has issues, you’ll see a “DNS not responding” error even though your internet connection is active.

Does flushing DNS delete anything important?

No. Flushing DNS only clears the cached lookup records. Windows will rebuild the cache fresh as you visit websites, with no impact on your files, passwords, or settings.