I work in IT retail and get free copies of all the major AV's. Trend Micro, upto 2008, was great and my choice for 4 years. I found McAfee, Norton, CA, no where as good as Trend. However, the 2008 Trend almost killed my PC. I switched to Norton 360, at the Symantec reps insistence. I've gotta tell you, it's great..yes great. I was an adament hater of Norton for killing all but the most brutally powerful machines.You don't even know 360 is on your PC. Anyway, that's my say.