What is a easy quick way of getting rid of a rogue fake virus?

WE clicked at an AP in Facebook after which something labeled PC Stability Guardian keep appearing and stating I bought a virus and they can get rid of it intended for 49.99.I have McAfee safety measures and Glass windows Defender nevertheless I however see that in Applications, I deleted it but it comes backside.Help I need this down my personal computer.
Gives thanks In Avance

malwarebytes…

WARNING – DON’T download ‘removal tools’ out of fake Korean ‘ant-virus’ sites:-)

PC Protection Guardian eradication instructions:

http://deletemalware.blogspot.com/2011/05/how-to-remove-pc-security-guardian.html

http://www.bleepingcomputer.com/virus-removal/remove-pc-security-guardian

Download free anti-malware software from your list down below and run the full system search within.

* MalwareBytes Anti-malware
http://www.malwarebytes.org
* SUPERAntispyware
http://www.superantispyware.com
* Spybot S&D
http://www.safer-networking.org
* Hitman Seasoned 3.5 VARIOUS
http://www.surfright.nl/en/hitmanpro

Enjoy!