Some notes about my experience with the upgrade of a Trend Micro OfficeScan 10.6 to 11.0.

Check the version requirements before upgrading: Upgrade path to OfficeScan 11.0.

Basically, be sure to have the latest version of your current major version and service pack installed.

Upgrade considerations for OfficeSCan (OSCE) servers and clients/agents

Check the system and OS requirements, as they have changed since 10.6 and 11.0. When upgrading, it is also recommended to create a backup, in case something goes wrong during the upgrade.

Upgrading from a version prior to 10, you may have to workaround losing your defined scan methods. This is not required when performing an in-place upgrade fro  ...