Protection programs for computers are always a matter of trust, as a layman can understand almost as well and effectively such software works and an assessment can take some time to make. Whether one has caught a virus or trojan, you do not always get with when he works quietly, one would have to scan the computer regularly with other virus programs in order to be safe. I had run several antivirus programs, etc. and have never had real problems with malicious software. Before I buy the version of the Comodo Internet Security Pro 8 installed, I tested a few days the freeware version and was very satisfied. It is a complete security software incl. Firewall, antivirus, protection against data theft and a games mode for Online Games. Commodo seems to be very confident of their software, they guarantee but 300.- Euro, the computer should be infected by a virus anyway, what more could you want? The prerequisite is that you can even completely examined by the Comodo Internet Security Pro 8 on his computer viruses and the "safe mode" selected. Installing DVD ran smoothly and very quickly, but you should choose not the default installation, whom you not to Commodobrowser and GeekBuddy do not want to install, the latter is used to support, so it is quite useful. The software not only works with white / blacklists of known viruses, but testing unknown files in real time in a virtual environment, so that nothing can happen. Theoretically, this should really provide almost 100% protection, which has really convinced me! One can also use a virtual desktop to test unknown software or surfing on doubtful sites without their real computer like this can happen. There is a Minianwenung on the desktop, the "safe" or in red "insecure" indicates the current download / upload speed in real time, either in güner Scripture, in the latter case you should go to the problem on the ground, the virus definitions may not uptodate etc. One can at the Comodo Internet Security Pro 8 seeehr make many detailed settings that are most users overwhelm, you should definitely make only settings that would explain why! Otherwise just leave the default settings as they are. The basic settings are easy at the firewall, there are for example the secure mode, training mode, block everything, your own policy or from. The Comodo Internet Security Pro 8 consumes little resources and memory (you can see in Task Manager), the installation took just under 160 MB, which is not much, the popular Antivir Freeware requires about 200 MB and has no firewall. Mich was the Comodo Internet Security Pro convince 8, also it does not cost much and Commodo offers as I said 300.-Euro, should they fail. More can not ask you!