Hi everyone, My USB flash drive seems to have picked up a virus of some kind from one of the crappy old PCs in college. Couldn't see it when I opened the USB folder on my Mac, but it shows up on PCs. I did a virus scan and it was being detected by Avast, but I couldn't remove it. I formatted the USB drive, and now no infections are bring detected by Avast/Sophos/ClamXav, however... the virus file still show up when I plug the USB into a Windows PC! How can I get rid of these files? Don't want to infect any other PCs! Thanks!