To uninstall Trend Micro Internet Security successfully, you need to make sure two things happen: The program has been fully closed/disable; All of its registry keys have been cleaned up. This sounds like a basic rule to uninstall any program, but none of these two things can be done easily, as Trend Micro embedds almost every part of its services into your system, consequently making users difficult to either completely disable this software or locate every registry key.
First to shut down Trend Micro, you can right-click the tray icon to close background services or kill its process by pressing Ctrl+Alt+Del to open task manager. But I think the safest place to close and fully uninstall Trend Micro Internet Security is in Safe Mode, in which you have an guarantee that neither the Security’s services nor other programs that may have files associated with Trend Micro will be loaded.
The second thing you need to do is to clean up all its files and registry keys. Normally going to Control Panel->Add/Remove programs can remove all major files as well as its relative registry, as long as you do it in Safe Mode. But this does not necessarily give you a complete uninstall, you may still get services popping-up and, any attempts to re-install it or install other security software may be denied. If that is what happens in your case, you may as well try to find and locate the following files and directories:
- C:Program FilesTrend Micro
Since the entries related to these files stay in separate parts of your registry and hard to pinpoint, you properly will risk a danger of messing up your registry while still ending up with a failing uninstall. I did not want this risk so I turned for a help when I wanted to uninstall Trend Micro Internet Security. A small application named Perfect Uninstaller came as my final solution. It has a special method called Force Uninstall which can automatically look deep into your system and erase everything regarding the files and registry based on the directories and files you provide, meaning that you only need to locate the files mentioned above, the rest of the job will be quickly done by Perfect Uninstaller.