Certificate errors: frequently asked questions

Here are answers to some common questions about certificate errors.

Show all

What do the different certificate errors mean?

The following table contains a list of common certificate errors and information about what they mean.

Error message
What it means

This website’s security certificate has been revoked

Don't trust this website. This error often means that the security certificate was obtained or used fraudulently by the website.

This website’s address does not match the address in the security certificate

This error means that a website is using a certificate that was issued to a different web address. This error can occur if a company owns several websites and uses the same certificate for multiple websites.

This website’s security certificate is out of date

This error occurs when the certificate has expired. Websites must renew their certificates with a certification authority to stay current. Outdated certificates can be a security risk.

This website’s security certificate is not from a trusted source

This error occurs when the certificate has been issued by a certification authority that isn't recognized by Windows Internet Explorer 9. Phishing sites often use fake certificates that trigger this error.

Internet Explorer 9 has found a problem with this website’s security certificate

This error occurs when Internet Explorer 9 finds a problem with a certificate that doesn't match the other errors listed in this table. It could be because a certificate has been corrupted, tampered with, is written in an unknown format, or is unreadable. You shouldn't trust the identity of the site if the certificate has this error.

I'm getting errors on websites I always visit, what should I do?

Try retyping the address you're using. For example, if you're typing the address as https://example.com, try changing it to https://www.example.com.

It's also possible that the website's certificate has expired, and the owner or operator of the site needs to contact the certification authority to renew it. Contact the website to report the problem.

Is it ever safe to ignore a certificate warning and continue to a website?

If Internet Explorer 9 detects a problem with a certificate, it isn't recommended that you continue to a website. If the certificate has an error, it might indicate that your connection has been intercepted or that the web server is misrepresenting its identity. If a certificate error has occurred and you believe the website is trustworthy, contact the website to report the problem.