Sometimes, a PC may have been disconnected from the network, and the password for the Client/Server Security Agent (CSA) for Trend Micro’s Worry Free Business Security is unknown or lost or forgotten. The following knowledge base article describes how to uninstall the agent if this case arises – http://esupport.trendmicro.com/solution/en-us/1036275.aspx

Basically, it involves setting the registry key “Allow Uninstall” to 1.
For WFBS versions 5.x and 6.x, this key is located here – HKEY_LOCAL_MACHINE\SOFTWARE\TrendMicro\PC-cillinNTCorp\CurrentVersion\Misc
For WFBS versions 7.x, this key can be found here – HKEY_LOCAL_MACHINE\SOFTWARE\TrendMicro\UniClient\1600\Misc