It also includes other spammy or intentionally misleading applications. Browser toolbars often fall into this category. These undesirable programs are called “Potentially Unwanted Programs,” or PUPs. And while bad actors like this typically get quickly removed from the market place, there’s new ones popping up frequently. It looks like a useful application, but you aren’t aware that it is hijacking your system and slowing down your computer. This happens most frequently with fake anti-virus programs like MacDefender.
However, thanks to misleading file downloads or false advertising, users sometimes intentionally install malware. Most malware is installed without the user’s consent or knowledge. According to Wikipedia, this includes “computer viruses, worms, Trojan horses, ransomware, spyware, adware, scareware, and other malicious programs.” Malware, short for “malicious software,” is any type of program that interferes with the operation of a user’s computer or acts against the desires of the user.
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