A computer security software, as the name suggests, is a software program which when installed into your computer, secures it from external threats such as virus, malware, spyware, botnets and the like. A computer virus is a program that attaches itself to files, and spreads from one computer to another during the process of transfer of files. Once a virus enters the system, it is not easy to remove it as it comes with the ability to replicate itself. A virus has the potential to damage the hard drive of your computer. An anti-virus software detects the presence of virus, and other related threats on your computer, and checks the spread of virus from potential sources such as spam, e-mails, web pages, pop-ups, etc.
