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- DOCUMENT:Q101789 28-SEP-1993 [W_NT]
- TITLE :Reconstruct BOOTSECT.DOS
- PRODUCT :Windows NT
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:
-
- ----------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT operating system, version 3.1
- - Microsoft Windows NT Advanced Server, version 3.1
- ----------------------------------------------------------------------
-
- BOOTSECT.DOS is created by Windows NT Setup. The boot sector found in
- sector 0 of drive C is copied into BOOTSECT.DOS before Setup writes
- the Windows NT boot sector. (Setup will not overwrite an existing
- BOOTSECT.DOS.) If you choose a previous operating system, Windows NT
- executes BOOTSECT.DOS, simulating the previous operating system's
- normal boot procedure.
-
- Because the information in BOOTSECT.DOS is really created by the
- previous operating system, it is very difficult to re-create. You must
- transfer the BIOS parameter block (BPB) from the boot drive (C) at
- sector 0 into the boot code from the previous operating system and
- write this into BOOTSECT.DOS. To do this, use the following procedure:
-
- 1. Use the proper utility to regenerate a boot sector for the previous
- operating system. For example, if the previous operating system is
- MS-DOS, boot MS-DOS from a floppy disk and run the SYS C: command.
-
- 2. Start Windows NT Setup from the boot floppy disk (this may be disk
- 1 of the Windows NT floppy disk set, the boot floppy disk for the
- Windows NT CD-ROM, or may have been created during a setup using
- WINNT.EXE), and initiate repairs by pressing R at the first Setup
- screen.
-
- 3. Follow the instructions provided by Setup. When Setup presents you
- with the list of optional repair tasks, make sure you have enabled the
- "Verify boot files on your C: drive" item.
-
- 4. Follow instructions until you see a message stating "Setup Repair
- is complete."
-
- BOOTSECT.DOS should now be restored to its original state. You should
- be able to boot your previous operating system.
-
- Additional reference words: 3.10
- KBCategory:
- KBSubCategory: STP FILSYS
-
- =============================================================================
-
- THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
- PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS
- ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO
- EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
- ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
- CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
- MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
- POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION
- OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
- SO THE FOREGOING LIMITATION MAY NOT APPLY.
-
- Copyright Microsoft Corporation 1993.