prevent usb from virus

I use usb flash on many different PCs and usb flash catches viruses from them. I dont have admin access on those computers to install antivirus,etc. I need a software that I can copy on usb flash and it prevents autoruns,etc from being copied into usb flash. any ideas ?
Answer #1
http://www.google.com?t=17838707&highlight=
try this
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Answer #2
I strongly recommend panda usb vaccine. It is free and very small piece of software. Install it in your pc, then vaccinate your pc and then vaccinate the pendrive. It basically prevents viruses from creating autorun.inf file by creating one. You won’t need to install it in any other pc.
Answer #3
agreed with . me also using panda usb vaccine.
Answer #4
another, similar to Panda USB Vaccine, is Bitdefender’s USB Immmunizer..which is also free.