The introduction of software system has proved its importance in our life. Any discovery or any innovation has its own advantages and disadvantages. Like in the legal system every civil and criminal law has its own loop holes to escape from the crime, the software system has also disturbed by anti-social elements. They find so many ways to disturb the system by viruses and so many other illegal practices. To protect the system from the viruses and other disturbances, so many web sites are trying their level best to protect the software. Some small companies and large companies are providing the anti-virus software and they are charging the amount for the service offered. Among all the security software companies Norton is the best one known in the web world. The Symantec is one of the largest security software companies having its base since 1982 and every year the Norton.com is introducing something special to protect the system from anti-virus. Norton protects the software from anti-viruses, spyware, worms, Trojans, key-loggers, adware and pop-ups. Many innovative technologies have introduced by Norton to protect the system and are known as anti-virus, anti-spyware, bot protection, Norton plus updates, antirootkit and network mapping ad monitoring. All the above mentioned features combined to protect our PC from the latest viruses, spyware and malware threats. Besides these features provides fast powerful online protection to shield our system from cyber-attacks. These cyber-attacks are happened while chatting and viewing various web sites. It is not an uncommon thing to mention here that most of the cyber-attacks are happened while viewing some unwarranted sites like world sex, and other sex related sites. It is because of the weakness of the viewers that is well known to the anti-elements. Slow down our PC and capturing our important files are the immediate threats caused by viruses. These have to be curtailed only by installing the best anti-virus software like Norton software.