Yontoo Trojan, detected by noted security company Dr. Web is blamed for tracking the browsing behaviors across a range of popular browsers like Safari, Chrome, and Firefox. It may pretend as a media player, download manager, or other plug-in, thereby directing you to some maliciously crafted Web sites disguised as sources for file sharing and movie trailers.
Despite updated operating system, browser, browser add-ons, installed firewall, and acute computer security settings, clever viruses, spyware or Trojans may find loop-holes to slip into your system. Not only in terms of performance, but in terms of stability and security too, these malicious software push you on back-foot. What to do next?
I've included every type of computer virus in this article that I felt was relevant, but this isn't a list of every type of virus known to man. Also, I did not include any worms or trojans, two common threats that are similar to viruses but technically not the same. If there is a specific type of virus that you feel was missed and is important, let us know in the comments.