In case, you’re seeing “This Site is Not Secure” or “Security Certificate is Not Secure” in Microsoft Edge, Internet Explorer, Google Chrome, Firefox or any other web browser with error “DLG FLAGS INVALID CA” on Windows 10 PC, then you must read this article till the last line. I’m sure you will find it useful.

I decided to cover this article because lots of users reporting that they are seeing This Site is Not Secure message while trying to open their favorite websites. The exact error message which users see is this:

This might mean that someone’s trying to fool you or steal any info you send to the server. You should close this site immediately.
Your PC doesn’t trust this website’s security certificate.
The hostname in the website’s security certificate differs from the website you are trying to visit.
Error Code: DLG_FLAGS_INVALID_CA
DLG_FLAGS_SEC_CERT_CN_INVALID.

Fix: This Site is Not Secure or Security Certificate is Not Secure Error

The worst part about this error is that users have no idea why they seeing this error and I’m sure that is why you’re reading this article. Right? Don’t worry in this article I will tell you why you’re seeing this error and what things can be done to get rid of this error.

Why you seeing this Certificate error message in browser

There might be lots of reason why you seeing this Certificate Error, but the top reasons are:

• When the certificate on the website is not correctly installed
• The certificate installed on the websites has not renewed or it’s expired
• When there is a malicious redirection on the website or it is compromised

So chances are high that because of these prime reason, you’re seeing the Certificate error on the websites.

What options you’ll see on the page with Certificate error

• Close this tab and not visit the website
• Go on to the webpage (not recommended)

What you can do to get rid of Certificate error

Here is what you can do:

• Clear the browser cache of your default browser and try again. (Clear Edge browser cache)
• Try to open the webpage with certificate error in another browser.

What is Recommended?

In this situation, I recommend that if you trust the website, then you can visit the website. In case, you have any doubt or not sure if the website is genuine or not, then try not to visit the webpage.

Also, if your trusted website showing this certificate error again and again, then you can contact the administrator of the website and tell him to figure out the issue.

I hope you find this article useful. In case, you have any other suggestion to fix this Site is Not Secure error message let me know in the comments.

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