Plugging an unknown drive into your computer is the digital equivalent of finding a random syringe on the street and testing it on your arm. To stay safe, you need to understand how to perform a proper USB virus scan.
If your drive has a physical switch, flip it to "Read Only" before plugging it into a computer you don't trust. usb virus scan
Users manually initiate a full scan of the USB drive. Plugging an unknown drive into your computer is
Don't wait until your computer is acting strange. Run a scan: usb virus scan