My brother-in-law posted this on his Facebook, I'm taking it serious.
IMPORTANT: Virus Spreading Through Instant Messaging Clients Currently there is a virus spreading through instant messaging clients that is affecting computers. Users are seeing fake instant messages from contacts that they know asking to look at a webpage or download a file via the link provided.
DO NOT click on the link. If you receive an instant message from any one of your contacts with a link, first ask the contact if they send the link. The virus is affecting but not limited to all popular instant messaging client including MSN, Yahoo, Skype, and AOL.
The Virus is a Trojan and is a scareware or Ransumware virus that's called Antivirus XP or Antivirus 7
Once infected you are *explicative removed*, it is almost imposible to get rid of it and time is a factor in removing it.

He works in the computer business, he knows what he's talking about.