So it appears the error message you are seeing is NOT the same as the one that appears in the title of this thread so why again did you think plugging in a USB flash drive would solve the problem?
Microsoft will not look for any solutions that have to do with AutoCAD.
Search the AutoDesk website and as your criteria put in the exact error message as you are seeing. Maybe you'll get lucky and it is one of the more common errors that actually has a solution.
I'm Reese. Sergeant Tech-Com, DN38416. Assigned to protect you. You've been targeted for termination.