Once you have downloaded your PFX, make a note of your PFX code that appears in the Trustwave Control Center. This code is necessary to install your Digital ID on your computer.

Type the code into the password field, and click "Mark this key as exportable". By allowing Windows to mark your key as exportable, you are allowing yourself to export your key and certificate later. If you ever need to purchase a new computer, you can export your certificate to the new computer if you check this option. If you choose to enable strong private key protection, you will be prompted for your confirmation whenever any program is attempting to access your Digital ID for any reason.

Press Next, then make sure that "Automatically select the certificate store..." is chosen. Press Next, then Finish, then OK. Your certificate and key are successfully installed in Windows, but you will still need to configure Outlook Express to use this certificate.

Within the Security Tab of Options, you can click "Add digital signature to outgoing messages" to automatically sign every message that you send. To have the best compatibility with your recipients, we recommend that you also select the "Send clear text signed message..." as well.

If you would like all e-mails to be encrypted when they are sent, click "Encrypt contents and attachments for outgoing messages".

Click OK when you are finished. Your Trustwave Secure E-Mail Digital ID is now completely installed.