I'm in the market for a new antivirus program, and I'm interested in one that is obviously reliable but is also as minimal of a resource hog as possible. FYI, I'm willing to pay for it, so you can suggest more than freeware. Also, I notice a lot of these programs these days are more than "antivirus" programs and are now "internet security" programs. Having used some of them in the past, I found that they tended to screw everything up and I would just go back to a plain-old antivirus program. Do any of these "internet security" additions work, or do they always mess everything up?