There is a Trojon Worm Virus that asks you to install an adobe flash plug-in. So far there is no repair for this virus. It destroys the Zero Sector of the Hard Disc where vital information of your comouter is saved.
DO NOT respond to an email named Invitation FACEBOOK, even if it’s from one of your best friends. When you log onto it it opens an Olympic Tourch that burns the whole hard disc C of your compter.
This virus will be received from someone you probably had in your address book. So if invitation FACEBOOK pops up in your email delete immediately.