We have in the company and the Kaspersky and when these pros use, so I thought it's good enough for me. Previously I had the free Antivir, but the virus attack was just not quite prevented. So I now have the 3PC Kaspersky version. When the program works, I do not know. Are there in the background updates loaded? Are all Downloads really tested? It seems to me in any case that the program is good because I have currently no virus problems.