Secure Socket Layer certificates make it possible to encrypt data transmitted between your computer and an external website. In most cases, you shouldn't need to remove an SSL certificate unless you find out the website used a fraudulent certificate or an expired certificate is preventing you from accessing certain areas of the website. Internet Explorer 11, Chrome and Firefox all use a slightly different process for removing a certificate.
Click the "Tools" menu and select "Internet Options" in Internet Explorer 11.
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Select the "Content" tab and choose the "Certificates" button.
Choose the certificate you want to remove and click the "Remove" button.
Select the Chrome menu icon on the toolbar. It looks like a set of three horizontal bars.
Select the "Show Advanced Settings..." link.
Select the "Manage Certificates..." button in the HTTPS/SSL section.
Click "Certificates" to filter the results to show only SSL certificates.
Right-click the certificate you want to delete and select the "Delete" option.
Launch Firefox, select the "Tools" menu and choose "Options." On a Mac, select "Firefox" and choose "Preferences."
Click the "Advanced" tab.
Select the "Certificates" tab and choose "View Certificates" to access the SSL certificates added to your system.
Choose the certificate you want to delete and select the "Delete..." button.