In case people haven't really got it yet - this is very possibly the worst problem with windows ever discovered and affects all MS Windows operating systems. If you just ignore it and hope it goes away you are being very silly. The code is already built into a very famous security testing tool which many people have and so can be used to make new variations any time.

Potentially any image file that opens with the shell extension could be used to compromise a PC and give a remote attacker complete control - or as the hackers like to say 'root your box'.

Any spam that you accidentally preview in Outlook Express could be your downfall, any image that is cataloged by Google (or another) Desktop Search application any image on any webpage viewed in IE or opened in the Explorer thumbnail view.

Which is nice.

BlackIce users will be interested to know that detection is built into the latest update.