It's sneaky, subversive, and treats users like pirates. Let me explain. I installed it (30 day trial) a year ago to check it out. I uninstalled it later that day. I noticed that it wasn't totally uninstalled, so I searched through my system with spotlight until I found every file associated with "Intego" or "Netupdate" or "Virusbarrier", and so on. I thought it was gone. Now, I installed it again on the same Mac couple of weeks ago to take another look at it. It tells me that my evaluation period has expired. Obviously, the installer leaves behind some deliberately misnamed file on the system somewhere to record the date it has been installed to avoid people trying to continue using the 30 day trial past the 30 days. Quitting the app is nearly as bad if you don't want to reboot. Kill one process, and another sprouts back up. I honestly had more trouble removing Virus Barrier X5 than I've had removing viruses from Windows systems..