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  2. NTLDR - Wikipedia

    en.wikipedia.org/wiki/NTLDR

    NTLDR (abbreviation of NT loader) is the boot loader for all releases of Windows NT operating system from 1993 with the release of Windows NT 3.1 up until Windows XP and Windows Server 2003. From Windows Vista onwards it was replaced by the BOOTMGR bootloader. NTLDR is typically run from the primary storage device, but it can also run from ...

  3. LOGO.SYS - Wikipedia

    en.wikipedia.org/wiki/LOGO.SYS

    LOGO.SYS. The post-shutdown screen (LOGOS.SYS) of all versions of English Windows 9x. LOGO.SYS is a core system file used by the Windows 9x family of operating systems to display its boot-up message. It is a system file that is used to display a boot screen as part of the startup process found in Windows 95, Windows 98 and Windows Me.

  4. Safe mode - Wikipedia

    en.wikipedia.org/wiki/Safe_mode

    For application of the term in spaceflight, see Safe mode in spacecraft. Safe mode is a diagnostic mode of a computer operating system (OS). It can also refer to a mode of operation by application software. Safe mode is intended to help fix most, if not all, problems within an operating system. It is also widely used for removing rogue security ...

  5. Protected mode - Wikipedia

    en.wikipedia.org/wiki/Protected_mode

    In computing, protected mode, also called protected virtual address mode, [1] is an operational mode of x86-compatible central processing units (CPUs). It allows system software to use features such as segmentation, virtual memory, paging and safe multi-tasking designed to increase an operating system's control over application software.

  6. BIOS - Wikipedia

    en.wikipedia.org/wiki/BIOS

    After the POST completes and, in a BIOS that supports option ROMs, after the option ROM scan is completed and all detected ROM modules with valid checksums have been called, the BIOS calls interrupt 19h to start boot processing. Post-boot, programs loaded can also call interrupt 19h to reboot the system, but they must be careful to disable ...

  7. Booting process of Windows - Wikipedia

    en.wikipedia.org/wiki/Booting_process_of_Windows

    In Windows NT, the booting process is initiated by NTLDR in versions before Vista and the Windows Boot Manager in Vista and later. [ 4 ] The boot loader is responsible for accessing the file system on the boot drive, starting ntoskrnl.exe, and loading boot-time device drivers into memory. Once all the boot and system drivers have been loaded ...

  8. Booting - Wikipedia

    en.wikipedia.org/wiki/Booting

    Booting. A flow diagram of a computer booting. In computing, booting is the process of starting a computer as initiated via hardware such as a button on the computer or by a software command. After it is switched on, a computer's central processing unit (CPU) has no software in its main memory, so some process must load software into memory ...

  9. Real mode - Wikipedia

    en.wikipedia.org/wiki/Real_mode

    e. Real mode, also called real address mode, is an operating mode of all x86 -compatible CPUs. The mode gets its name from the fact that addresses in real mode always correspond to real locations in memory. Real mode is characterized by a 20- bit segmented memory address space (giving 1 MB of addressable memory) and unlimited direct software ...