To properly uninstall TrendMicro OfficeScan 10.5 and have forgotten the uninstall password, you can very easily change it to something familiar, assuming you have administrative permissions on the computer.
Locate and open the INI-file Ofcscan.ini. By default this is located at:%PROGRAMFILES%\Trend Micro\OfficeScan Client\Ofcscan.iniNote that on 64-bit, the default install path will probably be %PROGRAMFILES(X86)%\Trend Micro\...
Search for the line beginning with:Uninstall_Pwd=!CRYPT!364EB2Although the password is encrypted in a hash, you can quite easily replace the hash with another hash of a password you do know. You can use this MD5 hash generator for it.
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 ...
The Trend Micro OfficeScan client can be installed on a workstation via the network (using an UNC-path) through the AutoPCC utility. The client can simply browse the OfficeScan server, locate the autopcc.exe utility, and run it, performing an installation of the OfficeScan client on the computer running the utility. By default, the installation of the client is not silent, meaning the user will see windows and dialogs appearing. Fortunately, it is possible to make AutoPCC to perform the installation completely silently, leaving the user almost unaware that an installation of OfficeScan is occurring.
To change this setting, log on to the OfficeScan server, and browse to the OfficeScan instal ...
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