How to Secure Your Computer With a BIOS or UEFI Password
 

A Windows, Linux, or Mac password just prevents people from logging into your operating system. It doesn’t prevent people from booting other operating systems, wiping your drive, or using a live CD to access your files.

Your computer’s BIOS or UEFI firmware offers the ability to set lower-level passwords. These passwords allow you to restrict people from booting the computer, booting from removable devices, and changing BIOS or UEFI settings without your permission.

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