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As the Internet threats continue to increase in number and complexity, some of the best antivirus programs, like Norton and McAfee, quickly respond to the justifiable consumer need to keep their computer environment secure. New and improved features enable these enhanced versions of antivirus and antispyware programs to detect, then quarantine and finally remove malicious code, which can harm computer files and/or disrupt a variety of computer functions.

Computer viruses are software programs deliberately designed to interfere with the usual computer operations, by recording, transmitting, corrupting, or deleting data. Some of these malicious programs also have the ability to copy themselves to other computer systems and thus spread to new unaffected computer units, much alike a human virus does. Since the introduction of the Internet, these dangerous software programs have increased in number and frequency, causing people to take measures against them. Nobody wishes to experience the frustration and anxiety of having to find ways to retrieve precious personal or business-related data, which most of the times are damaged severely or lost forever. In fact, the computer viruses can be of any form. They range from annoying software programs that run during setup mode and decrease a computer's ability to function properly by slowing things down or causing problems during an otherwise simple process, to complex destructive programs that may lead to the complete deletion of a computer's memory or other important components' distraction.

The most common way of getting a virus is from an email attachment, which is a file connected to an email message. Ranging from a simple Word or Excel file and images in JPEGs or GIFs formats, to any other type of file, even small computer programs, viruses travel through the cyberspace generating distraction and annoyance among all computer holders. The most annoying thing of all is that usually everything begins from an unwary computer user who shares the malicious file with others without even knowing it. In fact, even those wary computer savvies can be mislead, as some of the viruses existing today are extremely sophisticated forms of malicious software programs that run at the background of other computer programs, kwon also as worms. Alarmingly, these more advanced virus forms can replicate and send themselves automatically to other computers by controlling other software programs, such as an email sharing application.

The antivirus and antispyware programs, by scanning the files your computer's operating system creates, opens, closes or emails, is able to inform you in case a known virus is detected and attempts to enter your system. After the most recent forms of highly dangerous viruses called Trojans, for one to achieve consistent success in the medium to long term, it is necessary to keep his or her system fully patched via frequent downloads of updated virus dictionary entries.