It scans the computer quickly (less than 5 minutes) and does not slow down the computer (except for the few minutes it is scanning). Hitman Pro is designed to work alongside existing security programs without any conflicts. Two programs are effecting the performance of the computer dramatically, and sometimes even conflict causing the computer to crash. But in most cases, installing a second anti virus program is not a viable solution. You do need a second source to make sure you are secure. Just relying on a single vendor is not sufficient to completely protect you. '32% of computers infected, despite presence of anti virus program.' Research shows that computers are still run a chance of getting infected because the existing anti virus program is not giving you a 100% protection.
Hitman Pro is a second opinion scanner, designed to rescue your computer from malware (viruses, trojans, rootkits, etc.) that have infected your computer despite all the security measures you have taken (such as anti virus software, firewalls, etc.). This is the same what Hitman Pro does for your computer. But what do you do when the doctor tells you that he cannot find anything but your child still does not feel very well? Of course, you go to visit another doctor for a second opinion. If your child is not feeling well and you suspect he or she has a virus infection you're going to visit your doctor.
