Trend Micro recommends following the appropriate KB to enable Azure Code Signing (ACS) support before deploying Patch 2472 to prevent agent fresh installation and hot fix deployment issues. For more information, refer to Worry-Free Business Security (On-Premises) minimal Windows requirements for ACS (Azure Code Signing).
You can visit Trend Micro Download Center to obtain the latest version of the product or to check if there is a newer patch / service pack other than those listed in this upgrade path.
For a complete list of installation and upgrade requirements, refer to the WFBS SP1 product documentation.