You're responsible for technical support at a high school. you're concerned about students with some technical knowledge reconfiguring machines, either maliciously or not. you have already made sure windows is secure and the students' login has the minimum necessary privileges. what else should you do to prevent students from re-configuring the school lab computers?

setup a password for the BIOS

Explanation:

The BIOS refers to Basic Input/Output System. When a BIOS password is set, it will enforce autentication  whenever an attempt is made to login at startup. Remember that the computer's microprocessor uses the BIOS to bootup, and it is also responsible for managing information flow between the OS and other devices, therefore very sensitive settings are maintained here, setting up a password will further ensure that that students do not intentionally recomfigure the computers in the school laboratory.

answer///radio frequency interference (rfi);