USB drive is the best source for transferring malware from one computer to other . These malware get auto executed by using autorun.inf files and then these malwares may harm your computer. The best way for not auto executing these malwares when you insert flash drive or removable hard disk drive or any other storage device is by Installing Autorun Eater.
Autorun Eater is the small tool which is used to detect suspicious autorun.inf files, when the USB drive or CD/DVD drive is inserted. When the tool detects suspicious autorun files a pop-up window shows that suspicious autorun.inf file is detected. Simply You have to remove the file insted of ignoring that.
The latest version of this tool is Autorun Eater V2.5