Antivirus has become the most essential need of every computer system. The virus and malware attacks are increasing every day, which is very harmful for the health of your PC. Also, there is a threat of hijacking the important data on your PC which may result serious consequences. If you want to protect your computer from these potential threats, then it is advised that get an antivirus that is capable of scanning every kind of latest as well as old virus. If you do not take the viruses on your PC seriously then it will slow down your machine and may also cause system crashes or whole data loss. There is a wide range of free antivirus software that can be downloaded and installed to protect the PC from any potential threat.