Norton Antivirus, which was initially released in February 1991, is an anti-virus and anti-software package that provides computer security products. It can identify the present virus and malware in the operating system with the usage of ‘signature’ and heuristics. The software provides complete security to the desk/laptop or smartphone in whatever it has been installed. The operating system which supports the installation and smooth running process are Microsoft Windows (95 or later), Mac OS and Linux. If you wish to know how to install the software in the device and have any questions, then all of them will be answered at Norton customer care number.