How to make Chrome trust Windows system root CA certificate?

Solution 1:

Chrome uses the Certificate Store on Windows for validating certificates. If Chrome is complaining, then the certificate is not installed on Trusted Root Certificates on your local machine or the certificate's CN (Common Name) does not match the domain name you are accessing.

In order to install the certificate on trusted roots:

• Click on the red alert icon on the top left of the address bar, form drop down menu select certificate.

• Then navigate to the detail tab on the certificate window, from bottom right click on Copy to File, Export the certificate in DER encoding set the name of the certificate and Finish.

• Then open certmgr.msc expend the Trusted Root Certificate Authorities tree.

• Right click on Certificate from the drop down select all task then click import select your certificate chose Place all certificates in the following store and proceed to finish.

• Relaunch Chrome.

If this doesn't solve your problem, there is an issue in the certificate or someone trying to get in the middle (Man in the Middle Attack)! contact your system administrator.

Reference: https://www.techrepublic.com/article/how-to-add-a-trusted-certificate-authority-certificate-to-chrome-and-firefox/