You can read up about this virus here.
Pretty much its a virus that has been spreading around which will run on April 1st, and you should make sure your protected by checking out that above link.
So far it has supposedly affected up to 9 million to 15 million people, and Microsoft is even offering a $250,000 reward for the person who created it.
You can read about it more here.
This is not a April Fools joke.
