Among yesterday's optional software updates from Microsoft was Update for Windows XP/Vista/non-Windows 7 (KB971029).It's an "important, non-security update" that restricts "AutoRun entries in the AutoPlay dialog to only CD and DVD drives".Excellent. This could really help curb AutoRun worms. If you're using an older Windows computer, we highly recommend you go and apply this optional update.You'll need to visit update.microsoft.com and select "Custom" updates.And you'll find KB971029 in the "Software, Optional" category.This update restricts USB AutoRun functionality in the AutoPlay dialog. You may also wish to take further steps and disable AutoPlay completely. See here and here for posts on that topic.