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Presentation 31 – The Windows Boot Process

Presentation 31 – The Windows Boot Process. Objectives. At the end of this presentation, you will be able to:. Identify the phases of the boot process. Describe what happens when critical system files are lost or damaged. Install the Windows Recovery Console.

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Presentation 31 – The Windows Boot Process

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  1. Presentation 31 – The Windows Boot Process

  2. Objectives At the end of this presentation, you will be able to:

  3. Identify the phases of the boot process. • Describe what happens when critical system files are lost or damaged. • Install the Windows Recovery Console. • Access the Help, Copy, Delete (DEL), Fixboot, and Fixmbr commands from the Recovery Console DOS prompt.

  4. Booting Windows XP • First, the POST • BIOS locates Master Boot Record • MBR looks for System partition • MBR passes control to NTLDR • NTLDR reads BOOT.INI • BOOT.INI points to the Boot menu or to the location of the OS

  5. POST and BIOS • System Reset • Check for major hardware problems • Test basic system components • Look for a boot device

  6. Finding the MBR • BIOS follow the boot sequence configured in Setup • A, C, SCSI • C Only • CD-ROM, A, C • Search for active partitions which contain the MBR

  7. MBR • Points to system partitions • System partitions contain the OS loaders. • IO.SYS • NTLDR

  8. NTLDR Takes Over • Looks for BOOT.INI • Startup Menus • Any Microsoft OS can be launched from here

  9. BOOT.INI • Where is the OS? • What are the options?

  10. Where is the OS?

  11. BOOT.INI (cont’d.)

  12. NTDETECT.COM

  13. The Kernel Loads • \SYSTEM32\NTOSKRNL.EXE • Missing or corrupt? • Check BOOT.INI

  14. NTLDR Error

  15. Boot Error

  16. The Recovery Console • It’s a “Windows XP command prompt” • It’s very limited

  17. Recovery Console

  18. End

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