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USB sticks have always been a problem with potential malware. Turning off autoruns helps a lot but you can go one step further and use products like Panda’s USB vaccine. It will replace the autorun file on the USB making it relatively harmless. That said the larger risk usb access control isn’t so much the files with USB, it’s the drives firmware which is impossible to stop from doing something bad with the system. It’s way too easy to replace the firmware with something that emulates a keyboard… Let’s just hope that you’re not running with admin rights!
This is where it all gets a bit frustrating. Microsoft has announced that, with Windows 10, they will no longer require manufacturers to include the ability to toggle off Secure Boot. This means PC vendors will have the power to further raise the hurdles for alternative operating systems to be installed. The official decision has not been handed down yet. Even if it does usb protect take effect, this will not cause problems with older systems. And even if it does become a reality, distributions such as Ubuntu, Fedora, Red Hat, and SUSE won’t have any issues as they are already using official digital keys to meet the UEFI requirements. For smaller distributions (created by developers who cannot afford to purchase the keys), this could be a big issue.