WFBS 8.0 does not support the installation of Security Server on Windows 8.1 and Server 2012 R2. Download and install Critical Patch 2042 to be able to install WFBS 8.0 SP1 Security Agents in computers running on Windows 8.1 and Windows 2012 R2 platforms.
Trend Micro recommends installing WFBS 8.0 SP1 or later patches before installing this critical patch.
To download Critical Patch 2042, click the link that corresponds to your region:
Refer to the Readme file for more information about this Critical Patch.
WFBS 9.0 will support the installation of Security Server on Windows 8.1 and Server 2012 R2. The ETA of the new version is on January 27, 2014.