Certificate Portal Download and install this certificate on your computer. Your network is configured to actively inspect communication to secure websites. To make sure your communication with these websites is secure, and to make sure a security warning does not appear in your web browser, you must download and install this certificate on your computer. After you download the certificate, double-click the file and follow the instructions to install the certificate in your computer's Trusted Root Certification Authorities store. For installation assistance, contact your network administrator.