+ 0 Votes A few pointers... fijired2 6 years ago Don't know what you're running, but would presume you're talking about running the virus scan on Windows PCs. A few pointers:1. Check out portableapps.com - they have a good selection of apps you can install to a USB key.2. You'll need an AV app. modified to run from the key - you can't install something Norton AV or AVG Free and expect them to work on different PCs. Try ClamAV Portable, (portableapps.com/apps/utilities/clamwin_portable), updates are frequent and it leaves nothing behind on the host PC.3. You'll need an autorun.inf file which calls the executable, again you should find something on portableapps.com which may help and/or give you some ideas. For help specific to clamav, try clamav.netSorry to be so vague, my daughter has my USB key so I can't actually do anything to help.Good luck,Joseph + 0 Votes If it's one of those U3 capable USB drives, then there are loads of free ManiacMan 6 years ago and shareware apps out there, including AV.