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I have a USB flash drive that is packed with free and portable tools that can help me detect and clean virus from a computer. It is small for me to carry it along and convenient, just plug in and I can run my tools. However, there’s a big problem when I use the tools from my USB flash drive. Since a USB flash drive can be written, virus usually copies itself to the USB flash drive and creates an autorun.inf that has instructions to run the virus whenever it is open fro