Please help…

I have Dell Windows Vista 64-bit operating system.

I have previously used Trend Micro PC-Cillin Internet Security 2008. After reading reviews I decided to give Kaspersky internet security a try

Kaspersky will not install because it sees Trend Micro is installed PC-Cillin Internet Security 2008. 

When I try to uninstall Trend Micro I receive the message "A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution becomes available."

To remove Trend Micro I first tried using Remove Programs from Control Panel after that I tried removing everything to do with Trend manually from the PC. But still it is not removed.

The next step was to try use the cd of Trend Micro Internet Security 2008 to install it then uninstall in the hope that this would clean up the PC but it gives me that error message again  ("A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution becomes available ") so now I can’t uninstall it or install it. I don’t have a protection in my computer.

I also tried the TISSuprt the Trend Micro Diagnostic Toolkit to uninstall but no luck. Please advise me how to get rid of this program.

Thank you