One minute you’re browsing trusted sites on the Internet, the next, your PC freezes up and displays the dreaded blue screen of death, along with a fake tech support message. This strain of malware is duping plenty of computer users into calling the provided phone number, which only makes the situation worse.

Most hacking attacks are the result of a flaw or vulnerability found within the code of a program or operating system, but we rarely take into account the ones that don’t. Hackers often take advantage of the human side of hacking as well, a process known as “social engineering.” This is usually the act of conning users into handing over personal information of their own free will, and it’s surprisingly effective.