Many people have been lulled into a possibly false sense of security because nothing happened to their computer on April Fool’s Day from the Conficker Worm. But there are still millions of people infected with Conficker who don’t know it and nobody knows when it might act.
There is a very easy way to quickly see if Conficker is in your system.
Visit this website and depending on what pictures you see, you will be told if you are infected or not.