Use this link to a free online scanner for the conflicter worm and associates.
Remove Downadup - Removal tool for Downadup (known also as Conficker or Kido)
This scanner is quick and fast but a browser add-on will need to be installed for the scanner to work.
Those that are most likly to be infected are those from South America and Asia as that is where most un updated protection computers are located because of the use of pirated software.
Microsoft does not support updates to these areas unless proven WGA.