Remember, Downadup/Conficker spread so widely because so many computers simply did not have a simple security patch, released months before the infections ever started, applied. Weafer ). - Use a robust security software suite that has multiple layers of protection. Even patched systems are continuing to become infected with the .A and .B variants. In many instances, this is occurring because the worm is being passed on via infected removable media, such as USB thumb drives, that are essentially acting as host carriers. Need to Know) - Use caution when opening attachments and accepting file transfers. Use caution when clicking on links to Web pages. Use strong passwords