To Fix DNS Error on Laptop is a good prosses DNS errors can be frustrating, causing disruptions in your internet browsing experience and preventing you from accessing websites. Understanding and resolving these errors is crucial to maintain a seamless online experience. In this article, we will explore the common causes of DNS errors on laptops and provide you with a comprehensive guide to fix them.

Common Causes of DNS Errors

1. Network Connectivity Issues

When encountering DNS errors on your laptop, network connectivity problems often play a significant role. Issues such as weak Wi-Fi signals or Ethernet cable disconnections can interfere with the proper functioning of DNS resolution.

Fix DNS Error on Laptop

Wi-Fi Signal Problems

Weak Wi-Fi signals can lead to intermittent connectivity and DNS errors. The distance between your laptop and the wireless router, physical obstructions, or interference from other devices can weaken the Wi-Fi signal strength.

Ethernet Cable Disconnections

If you are using an Ethernet connection, ensure that the cable is securely plugged into both your laptop and the router. Loose or damaged Ethernet cables can disrupt the connection and result in DNS errors.

2. Incorrect DNS Server Settings

The DNS server settings configured on your laptop may be incorrect, leading to DNS errors. By default, your operating system may use the DNS servers provided by your Internet Service Provider (ISP), but alternative public DNS servers can often provide more reliable resolution.

Default DNS Configuration

The default DNS configuration on your laptop might be misconfigured or corrupted, causing DNS errors. Checking and modifying the DNS settings can help resolve these issues.

ISP DNS vs. Public DNS

Your ISP’s DNS servers might be experiencing problems, resulting in DNS errors. Switching to public DNS servers like Google DNS or Cloudflare DNS can offer a more stable alternative.

3. Firewall and Security Software Interference

Firewalls and security software are designed to protect your laptop from potential threats. However, they can sometimes interfere with DNS requests, leading to errors.

Firewall Blocking DNS Requests

Fix DNS Error on Laptop

Firewalls can mistakenly block DNS requests, preventing your laptop from accessing the necessary DNS information to resolve domain names. Configuring firewall settings can help resolve this issue.

Antivirus Software Restricting DNS Access

Certain antivirus software can impose restrictions on DNS access, causing errors. Temporarily disabling the antivirus software or whitelisting DNS programs can rectify this problem.

Troubleshooting DNS Errors

To address DNS errors effectively, you can follow these troubleshooting steps:

1. Restarting Your Laptop and Network Equipment

Rebooting your laptop, wireless router, and modem can resolve temporary glitches that might be causing DNS errors. This simple step often helps restore proper connectivity.

2. Flushing DNS Cache

Flushing the DNS cache on your laptop can clear any corrupted or outdated DNS data, allowing your system to fetch fresh DNS information.

Using Command Prompt (Windows)

In Windows, open the Command Prompt and type the following command: “ipconfig /flushdns”. Press Enter to execute the command and flush the DNS cache.

Terminal (Mac)

On a Mac, open the Terminal application and enter the command: “sudo killall -HUP mDNSResponder”. Press Enter, provide your admin password, and the DNS cache will be flushed.

3. Resetting DNS Settings

Resetting the DNS settings on your laptop can help eliminate any misconfigurations that might be causing DNS errors.

Fix DNS Error on Laptop


For Windows users, open the Control Panel, navigate to Network and Internet, and click on Network and Sharing Center. Select “Change adapter settings,” right-click on your active network connection, choose Properties, select Internet Protocol Version 4 (TCP/IPv4), and click on “Properties.” From there, choose “Obtain DNS server address automatically” or manually enter alternative DNS server addresses.


On a Mac, go to System Preferences, click on Network, select your active network connection, and click on “Advanced.” Navigate to the DNS tab, click on the plus (+) button to add a DNS server, and enter the desired DNS server addresses. Drag the newly added DNS server to the top to prioritize it.

4. Updating Network Drivers

Outdated or faulty network drivers can contribute to DNS errors. Updating your laptop’s network drivers can help resolve these issues.

Windows Device Manager

In Windows, open the Device Manager, expand the Network adapters category, right-click on your network adapter, and choose “Update driver.” Select the option to automatically search for updated drivers online, and follow the on-screen instructions to install the latest driver.

macOS System Preferences

On a Mac, go to System Preferences, click on Network, select your active network connection, and click on “Advanced.” In the Hardware tab, ensure that the “Automatically” option is selected next to “Configure.”

Changing DNS Server Settings

Modifying the DNS server settings on your laptop can be an effective way to fix DNS errors. The process varies depending on your operating system.

1. Windows

Control Panel Method

In Windows, open the Control Panel, go to Network and Internet, and click on Network and Sharing Center. Choose “Change adapter settings,” right-click on your active network connection, and select Properties. Double-click on Internet Protocol Version 4 (TCP/IPv4), choose “Use the following DNS server addresses,” and enter the preferred DNS server addresses.

Settings App Method

Alternatively, in Windows, open the Settings app, go to Network & Internet, select your active network connection, and click on “Change adapter options.” Right-click on your active network connection and select Properties. Follow the same steps as in the Control Panel method to configure the DNS server addresses.

2. macOS

1 Network Preferences Method

On a Mac, go to System Preferences, click on Network, select your active network connection, and click on “Advanced.” In the DNS tab, remove any existing DNS servers by selecting them and clicking on the minus (-) button. Click on the plus (+) button to add the desired DNS server addresses.

Terminal Method

Alternatively, on a Mac, open the Terminal application and enter the command: “networksetup -setdnsservers Wi-Fi [DNS Server IP Address]”. Replace “[DNS Server IP Address]” with the IP address of the DNS server you wish to use.

Disabling Firewall and Security Software

If your firewall or security software is causing DNS errors, temporarily disabling them can help troubleshoot the issue.

1. Temporarily Disabling Windows Firewall

In Windows, open the Control Panel, go to System and Security, and click on Windows Security. Select Firewall & network protection, click on the active network connection, and toggle the switch to turn off the Windows Firewall.

2. Configuring Firewall Settings (Windows)

If disabling the firewall completely is not desirable, you can configure the firewall settings to allow DNS requests. In the Windows Security settings, select Firewall & network protection, click on “Allow an app through firewall,” and add the necessary DNS programs to the allowed list.

3. Temporarily Disabling Antivirus Software

For antivirus software that interferes with DNS access, you can temporarily disable it by opening the antivirus program and finding the option to disable real-time protection or the firewall feature.

4. Whitelisting DNS Programs (Antivirus)

If temporarily disabling the antivirus software is not possible or undesirable, you can whitelist DNS programs within the antivirus settings. This allows the antivirus to function normally while allowing DNS requests from trusted programs.

Resetting Router and Modem

Resetting your router and modem can help resolve persistent DNS errors by refreshing the network connection.

Fix DNS Error on Laptop

1. Power Cycling Router and Modem

Turn off your router and modem by unplugging them from the power source. Wait for approximately 30 seconds, then plug them back in. Allow the devices to restart and establish a new connection.

2. Factory Resetting Router and Modem

If power cycling doesn’t resolve the DNS errors, you can perform a factory reset on your router and modem. Keep in mind that this will erase all custom settings, and you will need to reconfigure the devices from scratch.

Additional Steps

If DNS errors persist after trying the above steps, consider the following additional measures:

1. Checking for Malware or Adware

Run a thorough scan on your laptop using reliable antivirus software to check for any malware or adware that might be causing DNS errors. Remove any detected threats and perform regular scans to keep your system clean.

2. Contacting ISP for Support

If DNS errors persist despite troubleshooting on your laptop, contact your Internet Service Provider (ISP) for assistance. They can investigate if there are any network issues or DNS server problems on their end.

3. Seeking Professional Assistance

If all else fails, and you are unable to resolve the DNS errors on your laptop, consider seeking professional assistance from a computer technician or IT specialist. They can diagnose the underlying issue and provide tailored solutions.


DNS errors on your laptop can disrupt your internet browsing experience, but with the right troubleshooting steps, you can effectively resolve them. By addressing network connectivity issues, modifying DNS server settings, disabling interfering firewall and security software, and resetting your router and modem, you can overcome DNS errors and enjoy uninterrupted online access. If the issue persists, don’t hesitate to seek professional assistance to ensure a smooth and reliable internet connection.

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One thought on “How to Fix DNS Error on Laptop”
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