I heard Kaspersky was the best anti-virus software and bought it. Had a really bad experience because I could not uninstall my existing anti-virus software, after following their directions and every other thing I could think of. I contacted them by e-mail twice, explaining the problem, and they simply sent me the same standardized response with the same instructions that had been of no help earlier. Then I tried calling them and was holding on the phone for over an hour for a representative before I was logged off (their "office" closed). I called a couple of days later, was on hold for 45 minutes, and as soon as I began to speak, we were cut off. THEIR SUPPORT FUNCTION IS TERRIBLE AND I WOULD NOT RECOMMEND USING THEM UNLESS YOU REALLY KNOW WHAT YOU ARE DOING.