Using the tool is a simple matter of installing and then launching it, and clicking the Vaccinate computer button to disable autorun completely on your PC, which prevents malware from spreading to your PC through a flash drive. The interesting feature, however, is the ability to "vaccinate" your flash drive, which essentially just creates a hidden, protected autorun file on the drive so that viruses won't be able to easily infect it—though readers should note it's probably not fool-proof.
Panda USB Vaccine is a free download for Windows only. Readers should note that Windows 7 has removed the ability to auto-execute files from a USB flash drive, more or less preventing this problem from happening in the first place.
Panda USB Vaccine [Download.com via Guiding Tech]
