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[Yevrag35]

Depends on the software they are using to lockdown. Anybody can reboot into a live distro and change things that way if they are smart enough.

My old highschool even had the BIOS locked down, and they must've disabled booting from anything other than the HDD (Couldn't even get CD's to boot, let alone usb's).

 

[PP Mguire]

My old highschool even had the BIOS locked down, and they must've disabled booting from anything other than the HDD (Couldn't even get CD's to boot, let alone usb's).

That is easily worked around too, but you would need access to the inside of the PC.