There is currently a scare going around on Facebook and in emails stating that a Facebook application titled "Fan Check" is actually a virus that will activate after 48 hours even if you were tagged in a photo on someone else's profile. While the jury is still out on whether Fan Check is actually malicious, the greater risk comes from doing a search on the phrase '"Facebook Fan Check Virus" as you might be directed to a website containing fake antivirus software that will actually install a real virus or otherwise try to trick you out of your money. For an example of one of these sites watch the video below.
According to an article on Mashable the Fan Check app is most likely just a broken application that wont work because it violates Facebook's policies. Your safest bet is to stay away from Fan Check or any other application that claims that it can tell who's been viewing your profile, and definitely DO NOT search for “Fan Check Facebook virus”. If you are concerned that you have a virus or spyware scan your computer with trusted software. Do not install or scan your computer with any software that you are not familiar with or that you have not checked out thoroughly. Personally I use Spybot S&D, Adaware, and AVG Antivirus,
