{"id":896,"date":"2019-12-27T17:53:58","date_gmt":"2019-12-27T17:53:58","guid":{"rendered":"https:\/\/cheapsslsecurity.com\/p\/?p=896"},"modified":"2020-09-08T09:39:14","modified_gmt":"2020-09-08T09:39:14","slug":"how-to-resolve-comodo-rsa-certificate-not-trusted-error","status":"publish","type":"post","link":"https:\/\/cheapsslsecurity.com\/p\/how-to-resolve-comodo-rsa-certificate-not-trusted-error\/","title":{"rendered":"How to Resolve Comodo RSA Certificate Not Trusted Error"},"content":{"rendered":"

Two methods to help you fix this complex Comodo SSL not trusted error<\/h2>\n

Unlike other SSL related errors, the \u201cComodo RSA Certification Authority<\/a> Not Trusted\u201d or \u201cComodo RSA Certificate Not Trusted\u201d error doesn\u2019t appear as frequently. However, as you\u2019re reading this sentence right now, it\u2019s likely you\u2019ve come across it and it\u2019s occupying your attention. Well, not for long. In this post, we\u2019ll outline some simple steps that will make this error disappear out of your browser.<\/p>\n

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Let\u2019s get started on fixing this Comodo SSL not trusted error.<\/p>\n

The Reason Behind the \u2018Comodo RSA Certificate Not Trusted\u2019 Error<\/h2>\n

Wondering why your Comodo SSL certificate is not trusted? Let\u2019s take a moment to imagine you\u2019re a web browser (yes, we\u2019re quite serious here). A user gives you the order to visit a particular website that has an SSL certificate installed on its web server. As a browser, you must identify the authenticity of the SSL certificate and of the certificate authority (CA) behind it. How do you do it? The answer is root certificates of certificate authorities. The browser companies have things called \u201croot stores\u201d where they store root certificates of various certificate authorities that fit the criteria of their root programs.<\/p>\n

The Mozilla Project<\/a>, used by Firefox and the Thunderbird email client, is an example of such program. Mozilla accepts certificates from the CAs who meet the requirements of the policies of this program. They also have the authority to remove a CA if it fails to meet those requirements. So, when you (the browser) come across an HTTPS-enabled website, you\u2019re supposed to chain the SSL certificate to one of the root certs in the root store. That\u2019s how you validate legitimacy of the SSL certificate.<\/p>\n

Now, let\u2019s come back to the \u201cComodo RSA Certification Authority Not Trusted\u201c error. When you visit a site on which this error comes up, what happens is that your browser is not able to link the SSL certificate of that website back to its root store. A very likely reason cause of this error is that you might have deleted the certificate from your browser\u2019s root store unintentionally.<\/p>\n

Here\u2019s How to Fix Comodo RSA Certificate Not Trusted Error<\/h2>\n

There are two possible ways you can fix this error. The first one is finding out which root you\u2019ve accidentally deleted and reinstalling it in your browser\u2019s roots. The second one is deleting your browser and then reinstalling it. Let\u2019s explore both of these methods in a bit more detail.<\/p>\n

Method 1: Add the Missing Comodo Root to Your Browser<\/strong><\/h3>\n