Have you ever attached a USB to a computer and later found out that the drive is infected by a virus? I have definitely faced this situation many times. If you attach your USB drive to the infected computer the virus is transferred to the drive in no time infecting all the important documents in USB drive too, depending on the nature of the virus you may loose important data from the USB drive and never recover them back. But there is a solution to protect your USB drive from virus infection when it is connected to already infected computer.
If you make your USB drive into non writable mode then any kind of data can’t be written to it which means that if a virus infected computer is going to transmit any virus to drive, it won’t be able to because USB drive is write protected.
Write Protect Switch
Certain USB flash drives comes with write protector switch in them, using which you can write protect the USB flash / pen drive or make them read only drives. If the write protect feature is missing in the USB flash / pen drive then you can use USB Write Protector utility.
Thumbscrew is a freeware application that lets you write protect your USB drive so that virus, Malware, Trojan or any kind of infection from host computer would not be able to write anything on your USB.
Now right click the system try icon and choose Make USB read only. This would make the USB drive write protected which makes it completely protected from infections to to spread onto your drive.
USB Write Protector
USB Write Protector is another free utility that allows you make write protect your USB flash / pen drives just like Thumbscrew mentioned above. This is a very small utility that you can always carry with you in your portable drive.
By these applications your pen drive would be protected on that shared system but it is still recommended for you to use a quality antivirus software, and keep it updated regularly.
Editor’s note: I am currently using AVG antivirus, and my readers prefer NOD32, both are great antivirus software. So you can use any one of them.