computer safety check.....
DCWG detect and this page explains what it is, why it's so important to check, what to do if you come back red, etc explains it way better than me!!!
so please check your computers before july 9th!! spread the word!!!
ETA: THIS IS LEGIT!!!! Here is a link to snopes writing about this (many thanks to fallconsmate for the snopes reference!) and here is a very long article that seems sort of technical by the fbi.gov on their official fbi.gov site!!!