Go to: http://www.instantssl.com/ssl-certificate-products/ssl-certificate-index.html Scroll down till you see 'Free Secure Email Certificates' Select the Signup Button. After filling in and submitting the form, you should recieve an email from Comodo which asks you to 'collect your Secure Email Certificate'. To do this, click the button in the email - 'Collect and Install Certificate'. This will open up a new Internet Explorer window, and install the certificate in your browser. The page will display 'Successful!' when complete.