Virus is mainly spread via USB drives, if you want to stop these malwares, Panda USB Vaccine is a free utility it will help you to prevent malware infections due to the autorun feature of Windows. It provides double layer of preventive protection, allowing you to disable the AutoRun feature on computers as well as on USB drives and other devices.
User can choose two types of vaccinations: Computer Vaccination or USB Drive Vaccination. Computer Vaccination disable autorun completely on your PC, which prevents malware from spreading to your PC through a USB. Vaccine for USB devices is disabling the autorun files, preventing it from being read, created, deleted or modified. Panda USB Vaccine currently only works on FAT & FAT32 USB drives.