Antivirus software: Difference between revisions

Anti-virus programs are not always effective against new viruses, even those that use non-signature-based methods that should detect new viruses. The reason for this is that the virus designers test their new viruses on the major anti-virus applications to make sure that they are not detected before releasing them into the wild.<ref>{{cite web|url = http://www.zdnet.com.au/why-popular-antivirus-apps-do-not-work-139264249.htm?omnRef=NULL|title = Why popular antivirus apps 'do not work'|access-date = April 14, 2010|last = Kotadia|first = Munir|date = July 2006|url-status = live|archive-url = https://web.archive.org/web/20110430230447/http://www.zdnet.com.au/why-popular-antivirus-apps-do-not-work-139264249.htm?omnRef=NULL|archive-date = April 30, 2011|df = mdy-all}}</ref>

 

 

{{cquote|It's something that they miss a lot of the time because this type of [ransomware virus] comes from sites that use a polymorphism, which means they basically randomize the file they send you and it gets by well-known antivirus products very easily. I've seen people firsthand getting infected, having all the pop-ups and yet they have antivirus software running and it's not detecting anything. It actually can be pretty hard to get rid of, as well, and you're never really sure if it's really gone. When we see something like that usually we advise to reinstall the operating system or reinstall backups.<ref name="CBC16Apr10" />}}