How to Fix ERR_CERT_AUTHORITY_INVALID error in Windows 10 [Steps]

What is ‘ERR_CERT_AUTHORITY_INVALID error’ in Windows 10?

If you are facing ‘ERR_CERT_AUTHORITY_INVALID error’ problem on your browser like Firefox or Chrome in Windows 10 computer while browsing internet or while trying to access certain websites, then you are in right place for the solution. Here, you will be guided with easy steps/methods to resolve the error. Let’s starts the discussion.

‘ERR_CERT_AUTHORITY_INVALID’ error: It is common browser problem usually appeared while browsing internet or while trying to access certain websites. This error is appeared on browser like Chrome, Mozilla Firefox and/or other browser and states that the website you are trying to access or visit don’t have SLL certificate or if you the certificate are not updated or the browser doesn’t recognise the validity of certificate. Let’s take a look at error appeared on Chrome browser.

“Your connection is not private

Attackers might be trying to steal your information from (for example, passwords, messages, or credit cards).


This error indicates that there is some issue with SSL certificate of website whether the site doesn’t have an SSL certificate or the certificate is not updated. If this error is appeared with your own website or you are website owner, then you can try to fix the issue by resolving the SSL certificate problem in order to fix the issue. But if you are just website visitor, then you will need to contact website administrator via email ID or telephone number or via their social media account if any and ask them to resolve the website error.

However, ERR_CERT_AUTHORITY_INVALID error doesn’t mean you are browsing a risky website, as the error might be related to your browser or the Windows 10 computer. It means you need to fix your browser and computer issue in order to fix the issue. The possible reasons behind this issue can be outdated/corrupted browser cache and cookies, incorrect system date & time, interference of your third-party antivirus/firewall, problematic browser extension, your browser can’t verify the SSL certificate validity, and others. Let’s go for the solution.

How to fix ERR_CERT_AUTHORITY_INVALID error in Windows 10?

Method 1: Fix ‘ERR_CERT_AUTHORITY_INVALID error’ with ‘PC Repair Tool’

‘PC Repair Tool’ is easy & quick way to find and fix BSOD errors, DLL errors, EXE errors, problems with programs/applications, malware or viruses issues, system files or registry issues, and other system issues with just few clicks. You can get this tool through button/link below.

Method 2: Refresh the webpage or try Incognito Mode

Before troubleshooting the issue, you should try refreshing or reloading the webpage on your browser by pressing ‘F5’ key on keyboard while you are on webpage, and check if the error is resolved. If not, you can try accessing the same webpage in Incognito Mode/Private Window of your browser and check if the error is resolved.

Method 3: Clear browser cookies and cache

One possible way to fix the issue is to clear browser cookies and cache. Let’s try.

Step 1: Open ‘Google Chrome’ browser and press ‘CTRL + ALT + DELETE’ keys on keyboard to open ‘Clear Browsing Data’

Step 2: In the opened tab/window, select ‘All Time’ from ‘Time Range’ dropdown, select the checkboxes relating to cookies and cache and hit ‘Clear Browsing Data’ button and confirm it to clear the data. Once done, restart your browser and check if the error is resolved.

Method 4: Check and correct the System date & time

Incorrect system date & time can be reason behind the error. You can check and correct date & time on Windows 10 computer in order to fix the issue.

Step 1: Right-click on ‘System’s time’ in System Tray or in taskbar, and select ‘Adjust Date/Time’

Step 2: In opened window, locate ‘Sync Now’ under ‘Synchronise your clock’ and click on it. Now, Windows will assure the date & time are set correctly. Also, make sure ‘Set Time Automatically’ checkbox is checked.

Method 5: Try accessing the webpage using different network/WiFi

This error can be occurred due to network restrictions or network administrator is restricting you from accessing particular site for some security reasons. In such case, you can contact network administrator to remove network restrictions or you can try different network/WiFi. You can also try VPN Connection if the error is geo-specific means the error is appeared in only specific geo-location so you can try VPN to bypass geo-location and access the webpage.

Method 6: Change DNS server settings in Windows 10

You can change DNS server settings in order to fix the issue. Let’s try.

Step 1: Right-click on ‘WiFi/Network’ icon on System Tray or in Taskbar, and select ‘Network and Sharing Center’

Step 2: In the opened window, click on ‘Change Adapter Settings’ in left pane, right-click on your network adapter and select ‘Properties’

Step 3: In ‘Properties’ window, select ‘Internet Protocol Version 4’ and click ‘Properties’

Step 4: In ‘Properties’ window of IPv4, select ‘Use the following DNS server addresses’ radio option, type ‘’ and ‘’ in ‘Preferred’ and ‘Alternate’ DNS address field and then hit ‘Apply’ and ‘Ok’ button to save the changes.

Step 5: Once done, restart your computer and check if the error is resolved.

Method 7: Clear SSL state in Windows 10 computer

Step 1: Type ‘Internet Properties’ in Windows Search and open it from results appear

Step 2: In the opened window, click on ‘Content’ tab, click on ‘Clear SSL State’ button under ‘Certificates’ section and then hit ‘Apply’ and ‘Ok’ button save the changes

Step 3: Once done, restart browser and try accessing the page that was causing error, and check if the error is resolved.

Method 8: Disable antivirus/firewall/VPN

Another possible way to fix the issue is to block/disable your antivirus/firewall or VPN connection in your computer. It might possible this error is occurred due to interference of your third-party antivirus/firewall or VPN connection. Check if disabling antivirus/firewall or VPN connection works for you.

Method 9: Run SSL Server Test [For website owner]

This method is for the website owner. If you had installed SSL certificate before the error appears, then it may happen something goes wrong during the setup process. You should make sure you have installed SSL certificate properly. You can use free SSL check tool like ‘Qualys SSL Labs’ offers you need to enter the domain where the error appears and click ‘Submit’ button and then wait to few minutes for results and for perfect scores for all certificates you should get A+. If you get negative results or not the perfect, you need to install the certificate from trusted sources.

Method 10: Get SSL certificate from Trusted Authority

It is important to get SSL certificate from trusted authority. If you are using self-signed certificate, then this can cause invalid certificate authority error. Check if generating a valid SSL certificate for your website resolves the issue.

Method 11: Renew your SSL certificate

If the issue is still persist, then you can fix the issue by renew your SSL certificate for your website if certificate is expired. If you are using free certificates, you need to renew every 90 days whereas the paid have longer at least 1-year lifespan. Check if renewing certificate for your site resolves the issue.


I am sure this post helped you on How to fix ERR_CERT_AUTHORITY_INVALID error in Windows 10 with several easy steps/methods. You can read & follow our instructions to do so. That’s all. For any suggestions or queries, please write on comment box below.