Microsoft announced that "As of 18th January 2011, Microsoft will be signing anti-virus engines used by Antigen with a new certificate in order to continue to ensure secure and reliable virus engine updates.
This will require a new certificate implementation on any Windows 2000 server running Antigen 9," said the Redmond company via KB2491770.
In order to apply the necessary certificate, please follow these instructions:
- Access the following link: W2000 certificate
- Download the first certificate dated 26th September 2006.
- Run this executable on the Windows 2000 server where Antigen is installed.
Running this executable will install the certificate successfully.