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What Happens During the Boot Sequence

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  1. What Happens During the Boot Sequence • Ntldr reads and loads the boot loader menu • Ntldr uses Ntdetect.com • Ntldr loads the OS and device drivers • Ntldr passes control to Ntoskrnl.exe • An operating system other than Windows NT is chosen

  2. What Happens During the Boot Sequence continued

  3. What Happens During the Boot Sequence

  4. Files Needed to Successfully Boot Windows NT

  5. Troubleshooting the Boot Process • Last Known Good Configuration • Copy of hardware configuration saved from the Registry • Windows NT boot disks (3) • Windows NT emergency repair disk (ERD) • Contains information unique to the OS and hard drive (a backup of the Windows NT Registry on the hard drive)

  6. Windows NT Boot Disks

  7. Windows NT Boot Disks

  8. The Windows NT Emergency Repair Disk (ERD)

  9. Using the Boots Disks and ERD to Recover from a Failed Boot

  10. Using the Boots Disks and ERD to Recover from a Failed Boot

  11. Some Windows NT Errors at Startup

  12. Managing Legacy Software in the Windows NT Environment • Customizing an NTVDM for a DOS application • Customizing an NTVDM for 16-bit Windows applications • Why applications might not work with Windows NT

  13. Customizing an NTVDM for a DOS Application • Create a shortcut to the DOS application • Edit the properties of the shortcut • Configure memory for a DOS application to run under Windows NT

  14. Customizing an NTVDM for a DOS Application

  15. Customizing an NTVDM for a DOS Application

  16. Customizing an NTVDM for 16-bit Windows Applications • Create a shortcut for the application • Display Windows Properties box and check Run in Separate Memory Space

  17. Customizing an NTVDM for 16-bit Windows Applications

  18. Customizing an NTVDM for 16-bit Windows Applications

  19. Why Applications Might Not Work with Windows NT • DOS applications that try to access hardware directly are shut down by Windows NT • A 16-bit Windows application that uses virtual device drivers (VxD) will fail because these drivers attempt to access hardware directly • A 32-bit application developed on a different hardware platform than the current PC might not run under Windows NT • Some OS/2 applications are not compatible with Windows NT

  20. The Windows NT Registry • Hierarchical database containing all the hardware, software, device drivers, network protocols, and user configuration information needed by the OS and applications • Provides a secure and stable location for configuration information

  21. Ways in Which Some Components Use the Registry continued

  22. Ways in Which Some Components Use the Registry

  23. How the Registry Is Organized • Logical organization • Physical organization

  24. Logical Organization of the Registry

  25. The Windows NT Registry Editor

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