Worrying about how to protect your computer from the Conficker worm. The Conficker worm — as it happens in most of the cases — attacks the Windows Operating System. The worm exploits a previously patched vulnerability in the Windows Server service used by Windows 2000, Windows XP, Windows Vista, Windows Server 2003, Windows Server 2008, Windows 7 Beta, and Windows Server 2008 R2 Beta.
This link in detail explains how the Conficker worm operates.
Once this worm infects your computer your computer becomes a slave and it can be easily controlled remotely and the person controlling your computer can do whatever he or she seems like, for instance using your computer resources to get connected to other computers, excessive and important information and data, delete and modify your files, and for spying. It is mostly activated when you have the auto-run feature on on your PC. The auto-run feature is when you insert a USB drive or a CD or a DVD your computer asks how you should access the devise. It is something like what appears in the image below.
So you can also prevent your computer from this worm by disabling this feature. Other than this if you have already updatedyour virus database your computer is safe from the Conficker worm.
You should also install the necessity patches from Microsoft Windows website.
This Lifehacker blog post says that you can avoid getting infected by the Conficker worm if you use the OpenDNS service to access the Internet. This is because OpenDNS is constantly tracking the websites and servers that are infected by this worm.