You have found this article because you got an error message the read net::err_cert_common_name_invalid. We will show you all the ways to resolve this issue on your browser in this article. But first, here is what you must know.

Updating your browser is a quick solution to apply

  • Google Chrome is one of the most popular and most used web browsers in the world.It is a very secure and reliable tool to surf the web, but some users report having some trouble with it.Many encounter the err_cert_common_name_invalid error when trying to access certain websites, even secure websites.Provided there are no actual risks, this can get annoying, so we comprised a guide with several tips that will help you overcome it.

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We connect to the internet through our web browsers. The interconnection they offer us may expose us to online threats and malware.

A good way to stay safe is by communicating with security certificates between our browsers and servers or web resources. However, when credentials are mandated, we may receive error messages if something is out of sync.

This net::err_cert_common_name_invalid certificate error is one a few users have faced. So let’s show you how to fix it.

What is NET :: ERR_CERT_COMMON_NAME_INVALID?

As you must have guessed, this error is related to certificate issues. It simply means that your certificate’s common name is invalidated.

In such cases, your domain name and certificate name are a mismatch. Other problems may also arise from various extensions installed on your browser too.

This common SSL error on many platforms can also be due to a server misconfiguration of your website, a Chrome bug, firewall issues, or third-party extensions.

Also, while each Chrome update resolves known bugs in the browser, it can also introduce new issues if things don’t go as they should and could be a cause of the error.

Users may have the issue displaying any of the following messages:

  • err_cert_common_name_invalid
  • net::err_cert_common_name_invalid
  • err_cert_common_name_invalid in Chrome
  • Edge chromium err_cert_common_name_invalid
  • net::err_cert_common_name_invalid HBO
  • err_cert_common_name_invalid in Windows 10

Quick Tip:

Instead of troubleshooting Chrome, you can get back online fast using another browser. Opera is a great alternative because it’s built on Chromium and supports all Chrome extensions.

However, Opera is far more lightweight and includes modern features like an adblocker, an inbuilt VPN, and social media integrations.

How do I fix NET :: ERR_CERT_COMMON_NAME_INVALID?

1. Disable your antivirus or firewall

  • Click the Start menu, type firewall, and select the Windows Defender Firewall app.
  • On the left pane, click Turn Windows Defender Firewall on or off.
  • Click on both options to Turn off Windows Defender Firewall.
  • Visit a web resource and verify that the net::err_cert_common_name_invalid error is gone.

Antivirus programs and firewall applications are also the culprits for your browser’s errors. This results in SSL issues that will limit your browsing.

Opera

Try out this ultra-fast web browser for a change, and it might soon be your new default one!

You may disable security applications in the interim and check if it solves the issue.

Additionally, you could try using an antivirus tool that is both reliable and has minimum system interferences.

Antiviruses that are compatible with Windows 10 and 11 PCs are generally well built, with frequent updates that allow them to keep your system protected without causing any interference with other apps.

There are lightweight options silently in the background, stopping all forms of malware before it can even enter your PC.

Make sure to get a utility that has a fast response rate and can run regular scans while you take care of other tasks.

Some PC issues are hard to tackle, especially when it comes to corrupted repositories or missing Windows files. If you are having troubles fixing an error, your system may be partially broken. We recommend installing Restoro, a tool that will scan your machine and identify what the fault is.Click here to download and start repairing.

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Thankfully, many antiviruses implement more than just one type of shield, being able to prevent and remove all sorts of threats.

2. Reinstall Chrome

  • Click on the Start menu, type Chrome, then right-click on the Chrome app and select Uninstall app.
  • Follow the wizard to complete the uninstallation.
  • Visit the Chrome website and click Download Chrome to get a new executable file.
  • Click on the downloaded file and follow the wizard to complete the reinstallation.

This should resolve possible issues and get you in the clear. But, of course, don’t forget to backup your bookmarks and passwords.

You can do it manually or use a third-party cleaner utility. One such tool is CCleaner. It will remove any browser trace, allowing you to reinstall it as if it was never there.

⇒ Get CCleaner

3. Identify problematic extensions

  • Click on the Chrome menu, select More tools, and click on Extensions.
  • Click on the Remove button for individual extensions.
  • Visit a web resource and verify that the net::err_cert_common_name_invalid error is gone.

To determine that an extension is causing the trouble, you may browse in incognito mode first and see if everything is fine.

If you don’t see the error message in incognito mode, then an extension might be the culprit.

To identify the problematic extension, disable all the plugins in your Chrome browser, following the steps we outlined.

Then enable one extension at a time and visit any site to see if the error message still appears. Repeat this step for the rest of the extensions until you find the culprit.

4. Check proxy settings

  • Click the Start menu, type inetcpl.cpl in the Search box, and open the inetcpl.cpl utility.
  • Go to the Connections tab and click the LAN settings button.
  • Tick the Automatically detect settings checkbox and hit OK.

Now check if the error is gone after correcting your proxy settings. Proxy settings can also affect how your browser works. For example, a small error in the configuration is enough to cause problems with browsing, so be sure to check your proxy settings.

5. Clear cache and data

  • Press Ctrl + H on your keyboard.
  • On the left pane, click on Clear Browsing Data.
  • Select All Time from the Time range dropdown box, tick the options for Browsing history, Cookies and other site data, and Cached images and files, then click on the Clear data button.
  • Visit a web resource and verify that the net::err_cert_common_name_invalid error is gone.

6. Clean your SSL cache

  • Click the Start menu, type inetcpl.cpl in the Search box, and open the inetcpl.cpl utility.
  • Open the Content tab, then select Clear SSL State.
  • Click OK on the popup.

7. Update your Chrome

  • Launch the Chrome browser.
  • Click the browser menu, select Help, and click the About Google Chrome option.
  • Wait for the browser to check for updates, then restart your browser automatically.

How do I check my SSL certificate?

  • Navigate to the website.
  • Click on the padlock icon beside the website address and select Connection is secure.
  • Finally, click on Certificate is valid.

Why is my SSL certificate not secure?

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There are a few reasons why your SSL certificate may not be secure, but in most cases, it is because it has expired. In some cases, it could also be because the installation is not correctly done or completed on the server.

How do I install an SSL certificate?

  • Launch your browser.
  • Type the path below in the Address bar and click Enter. chrome://settings/security
  • Click on Manage certificates.
  • Click the Import button and follow the wizard to install your certificate.

If you have read to this point, we believe you must have fixed the net::err_cert_common_name_invalid error.

As a general rule, we recommend that you regularly update your browser; it is a great way to keep many browser-level errors away.

Some of the solutions will also work if you have a no proceed option certificate error on Chrome.

If you know of any other method to fix the ERR_CERT_COMMON_NAME_INVALID issue in Chrome, share them with us in the comment section below!

If the advices above haven’t solved your issue, your PC may experience deeper Windows problems. We recommend downloading this PC Repair tool (rated Great on TrustPilot.com) to easily address them. After installation, simply click the Start Scan button and then press on Repair All.

Still having issues? Fix them with this tool:

  • Browser errors

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