A CMOS password provides a layer of defense that software-based security cannot match. It is often used to:
A is a security credential stored within a computer’s Basic Input/Output System ( BIOS ) or Unified Extensible Firmware Interface ( UEFI ). Unlike your Windows or macOS login, which only protects your operating system files, a CMOS password acts as a gatekeeper for the hardware itself, preventing unauthorized users from changing low-level system settings or even starting the computer. Why Use a CMOS Password? cmos password
You must save your changes (often by pressing F10 ) for the password to take effect. What to Do If You Forget Your Password A CMOS password provides a layer of defense
Protect critical configurations—like boot order, overclocking, and hardware virtualization—from being tampered with. Why Use a CMOS Password
Required every time the computer is turned on. Without it, the computer will not proceed past the initial splash screen.
Select the password type you wish to enable, enter your chosen code, and confirm it.
Because these passwords are tied to the hardware, forgetting them can be a serious issue. Standard software "password reset" tools will not work here. 1. The CMOS Battery Method Set BIOS password | Security - Amherst College