Now a days most of us using USB flash drive for data carrying. But there is a common problem with these USB flash drive for virus attack and spreading to other computer. Is there any way to protect the usb flash drive from virus attack when I plugin the USB flash drive to other computer which I donot know is a infected computer ? Recently on right clicking on my pen drive I found that there is a option "Auto" added in the menu. Normaly the 1st option is "Open". I doubt it is a virus or something like, but it is not detected by the Antivirus software. Then I have formated the flash drive and get rid of this.