Fix err_cert_authority_invalid Error on Windows 10

The err_cert_authority_invalid error often pops up with the message “Your connection may not be private.” However, the problem is not always that you have navigated to a website which is not secure. It is essential to keep all your antivirus programs and firewall settings up to date because viruses entering your device are a big problem. That being said, it is sometimes these security settings that may be preventing a certain webpage from opening up. When the error is legitimate, it shows up because certain websites don’t have an ‘SSL certificate’ or the required credentials which certify a website as secure. However, many times the error occurs without any valid reason. The following troubleshooting methods may be used in order to fix the error.

5 Easy Fixes for err_cert_authority_invalid on Windows 10

FIX 1 – Check the date and time settings

If your Date and Time are not set properly, most Browsers including Chrome will not allow you to access webpages and the err_cert_authority_invalid error will pop up. You will have to go to your settings and change it to the correct date and time respectively in order to fix this problem. It is possible that the date and time settings got rolled back somehow on your Windows 10 PC however fixing this is very easy and would resolve the error effectively.

FIX 2 – Check Antivirus Settings

The err_cert_authority_invalid error is most often caused due to a hindrance by your antivirus program. This is probably the first solution you can try, apart from checking the date and time settings since this is an easy fix and also is most likely to be the cause of the problem. All antivirus programs run differently but the basic procedure to stop your antivirus program from blocking access to certain webpages is to turn off the ‘HTTPS scanning’ or the ‘HTTPS protect’ function. Below are a few ways you can turn off these features on specific antivirus programs.

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For Kasperskey:

  1. Go to Settings.
  2. Select Extend and click on Advanced Network Settings.
  3. There several options related with the SSL scan should show up.
  4. Select the one that allows you to navigate all browsers.

For Avast:

  1. Go to Settings and select Active Protection.
  2. Now choose Web Shield and then select the Customize option.
  3. Ensure that the Disable HTTPS Scanning option is unselected.

For Bitdefender:

  1. Go to Settings and navigate to Privacy Control.
  2. Go to the Anti-phishing tab.
  3. From there turn the Scan SLL option to ‘Off’.
  4. If you can’t find the Antiphishing tab you might have a different Bitdefender version. You can follow these steps instead: Navigate to Protection > Web Protection > Disable SSL Scan feature.

FIX 3 – Disable Chrome extensions

Sometimes some Chrome extensions may also prevent some webpages from opening up, resulting in the error popping up. This can be fixed by simply disabling the extensions installed on Chrome.

  1. Go to Chrome and click on the Menu icon located at the upper right corner.
  2. Click on More tools and select Extensions.
  3. Disable all installed Extensions and then reboot Chrome.
  4. Open Settings again, scroll down to Show Advanced Settings.
  5. Under Privacy you need to un-tick the Send a Do Not Track request with your browsing traffic option.
    net err_cert_authority_invalid
  6. Restart Google Chrome after all the above changes have been applied.

FIX 4 – Clear web browser history

It is a good idea to clear the browser history and associated caches on Chrome along with disabling the extensions to fully resolve the err_cert_authority_invalid issue. Below is how the process works on Chrome:

  1. Once again, go to Chrome’s Settings.
  2. Scroll down and select Advanced Settings.
  3. Pick the Clear Browsing Data option from advanced settings.
  4. Click on Browsing History, Cookies and other site data and Cached images and file. Click on Clear browsing data.
    This should clear your browser history.
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FIX 5 – Assign DNS settings

If the above solutions don’t work there may be a problem with the DNS settings, in which case you should follow the procedure below:

  1. Click on the Cortana icon and use the Search box to go to the Network and Sharing Center.
  2. From the left sidebar now select Change Adapter Settings.
  3. Right click on the Adapter that is currently active and select Properties.
  4. Choose Internet Protocol Version 4 from the list and then go to Properties.
  5. Pick Use the following DNS server address and type in Google’s Public DNS servers:, or respectively.
  6. Click Apply and restart your Windows 10 computer.

One of these five solutions should work for you in order to close the error err_cert_authority_invalid message and fix the error so you can keep browsing without any obstacles.

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