[Skunkworks] Installing Kaspersky Internet Security 2009 on WIn VIsta Bussines

Hi guys, I am trying to install kaspersky Internet security 2009 on Win Vista Business; It was bundled with McAfee 11 with internet advisor and after removing it .. deleting all associated files and registry keys.. I still get "remove incompatible software while installing Kaspersky" I have tried ccleaner and several other registry cleaners but I still get the same error. Any ideas??? Thanx Maina.