Most personal computers are now connected to the Internet and to local area networks, facilitating the spread of malicious code. Today’s viruses may also take advantage of network services such as the World Wide Web, e-mail, Instant Messaging, and file sharing systems to spread. A computer virus is a computer program that can copy itself and infect a computer without permission or knowledge of the owner. It is commonly but erroneously used to refer to other types of malware, adware, and spyware programs that do not have the reproductive ability. There are modern antivirus programs that try to find virus-patterns inside ordinary programs by scanning them for so-called virus signatures. Many users install anti-virus software that can detect and eliminate known viruses after the computer downloads or runs the executable or runs the executable. The question is how do you know that the free anti-virus is safe and secured? As we all know that there is lots of fake anti virus circulating in the Internet. ZSecurity provider is the safest anti-virus, anti-spyware and anti-malware provider. It has a complete A-to-Z system that the mission is to protect your computer.