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  2. Pre-boot authentication - Wikipedia

    en.wikipedia.org/wiki/Pre-boot_authentication

    A PBA environment serves as an extension of the BIOS, UEFI or boot firmware and guarantees a secure, tamper-proof environment external to the operating system as a trusted authentication layer. [2] The PBA prevents any operating system from loading until the user has confirmed he/she has the correct password to unlock the computer. [2]

  3. System Management Mode - Wikipedia

    en.wikipedia.org/wiki/System_Management_Mode

    Initially, System Management Mode was used for implementing power management and hardware control features like Advanced Power Management (APM). However, BIOS manufacturers and OEMs have relied on SMM for newer functionality like Advanced Configuration and Power Interface (ACPI). [9] [10] Some uses of the System Management Mode are:

  4. BIOS interrupt call - Wikipedia

    en.wikipedia.org/wiki/BIOS_interrupt_call

    BIOS interrupt calls perform hardware control or I/O functions requested by a program, return system information to the program, or do both. A key element of the purpose of BIOS calls is abstraction - the BIOS calls perform generally defined functions, and the specific details of how those functions are executed on the particular hardware of the system are encapsulated in the BIOS and hidden ...

  5. UEFI - Wikipedia

    en.wikipedia.org/wiki/UEFI

    UEFI replaces the BIOS that was present in the boot ROM of all personal computers that are IBM PC compatible, [5] [6] although it can provide backwards compatibility with the BIOS using CSM booting. Unlike its predecessor, BIOS, which is a de facto standard originally created by IBM as proprietary software, UEFI is an open standard maintained ...

  6. Firmware - Wikipedia

    en.wikipedia.org/wiki/Firmware

    ROM BIOS firmware on a Baby AT motherboard. In some respects, the various firmware components are as important as the operating system in a working computer. However, unlike most modern operating systems, firmware rarely has a well-evolved automatic mechanism of updating itself to fix any functionality issues detected after shipping the unit.

  7. BIOS - Wikipedia

    en.wikipedia.org/wiki/BIOS

    Award BIOS setup utility on a standard PC. A modern BIOS setup utility has a text user interface (TUI) or graphical user interface (GUI) accessed by pressing a certain key on the keyboard when the PC starts. Usually, the key is advertised for short time during the early startup, for example "Press DEL to enter Setup".

  8. ACPI - Wikipedia

    en.wikipedia.org/wiki/ACPI

    Advanced Configuration and Power Interface (ACPI) is an open standard that operating systems can use to discover and configure computer hardware components, to perform power management (e.g. putting unused hardware components to sleep), auto configuration (e.g. Plug and Play and hot swapping), and status monitoring.

  9. Windows Preinstallation Environment - Wikipedia

    en.wikipedia.org/wiki/Windows_Preinstallation...

    Startup Settings: Enforces a series of safe settings during the startup. Windows 10 adds the following: Restore factory settings: Allows users who upgraded to Windows 10 to revert to their original operating system. Appears as Recover from the cloud on devices whose factory settings include Windows 10. [citation needed]