How to Uninstall Trend Micro without a Password
- Browse to the following path in the registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\TrendMicro\PC-cillinNTCorp\CurrentVersion\Misc - Once there, on the right hand pane, double click the entry Allow Uninstall and set it to a value of 1
- Now you should be able to uninstall Trend Micro through the normal uninstaller in Add/Remove programs in Control Panel.
see also: http://sigkillit.com/2015/02/11/removing-trend-micro-clientserver-security-agent-from-dell-laptops/