Retrieving or Reactivating Certificate

I recently had to reimage my PC and as a result, it caused my digital certificate to no longer be installed on my PC. When attempting to re-retrieve the certificate, I receive a message letting me know that I have already registered. What do I do?

Are you retrieving a certificate from Comodo Certificate Authority services? For what purpose are you using this certificate? I will move your ticket to the proper sub board when I have the information.