How Do I Fix DNS Server Might Be Unavailable?


Larry Thompson

Are you experiencing issues connecting to the internet? One common problem that users encounter is the “DNS server might be unavailable” error. This error typically occurs when your computer or device is unable to establish a connection with the DNS server, which is responsible for translating domain names into IP addresses.

What is a DNS Server?

Before we dive into fixing the “DNS server might be unavailable” error, let’s first understand what a DNS server is. DNS stands for Domain Name System.

When you enter a website URL in your browser, such as, the DNS server translates this human-readable domain name into an IP address that computers can understand. This IP address allows your device to connect to the correct web server and retrieve the requested webpage.

Possible Causes of the Error

There are several potential reasons why you might encounter the “DNS server might be unavailable” error. It could be due to a faulty network configuration, issues with your Internet Service Provider (ISP), or problems with your router or modem. Additionally, incorrect DNS settings on your computer or device can also trigger this error.

Fixing the “DNS Server Might Be Unavailable” Error

Now that we have an understanding of what a DNS server is and why you may encounter this error, let’s explore some solutions:

1. Restart Your Router and Modem

In many cases, simply restarting your router and modem can resolve temporary network issues.

To do this, locate the power source of both devices and disconnect them from power for about 30 seconds. Then, plug them back in and wait for them to fully restart before attempting to reconnect to the internet.

2. Check Network Cables

If you are using wired connections, ensure that all network cables are securely plugged in.

Sometimes, a loose cable connection can cause the “DNS server might be unavailable” error. Double-check the connections between your computer, router, and modem to make sure they are properly connected.

3. Update DNS Server Settings

Incorrect DNS server settings on your computer can lead to connectivity issues. To update these settings:

  • Step 1: Press the Windows key + R to open the Run dialog box.
  • Step 2: Type “ncpa.cpl” and press Enter. This will open the Network Connections window.
  • Step 3: Right-click on your active network connection and select Properties.
  • Step 4: In the Properties window, scroll down and select Internet Protocol Version 4 (TCP/IPv4). Then, click on the Properties button.
  • Step 5: In the next window, select “Use the following DNS server addresses”.
  • Step 6: Enter a reliable DNS server address such as Google’s Public DNS (8.8.8 and 8.4.4) or your ISP’s recommended DNS server addresses.
  • Step 7: Click OK to save the changes.

4. Disable Firewall or Antivirus Software Temporarily

In some cases, firewall or antivirus software may block certain network connections, including those to DNS servers. Temporarily disabling these security programs can help determine if they are causing the “DNS server might be unavailable” error.

5. Contact Your Internet Service Provider (ISP)

If none of the above solutions resolve the issue, it’s possible that the problem lies with your ISP.

Reach out to your ISP’s customer support for assistance. They can provide guidance and perform further troubleshooting steps if necessary.


The “DNS server might be unavailable” error can be frustrating, but with the right steps, you can troubleshoot and fix this issue. By restarting your router and modem, checking network cables, updating DNS server settings, temporarily disabling firewall or antivirus software, or contacting your ISP, you can regain access to the internet and resolve this error.

Remember to always double-check your network settings and consult with professionals if you’re unsure about making any changes.

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