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- DOCUMENT:Q92383 02-NOV-1993 [W_NT]
- TITLE :Problems Installing Other Operating System after Windows NT
- 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
- -------------------------------------------------------------
-
- SUMMARY
- =======
-
- After you successfully install Windows NT version 3.1, Microsoft does
- not recommend that you install other operating systems on the same
- computer.
-
- MORE INFORMATION
- ================
-
- When Microsoft Windows NT is installed over a previous operating
- system, it copies the contents of the boot sector to a file called
- BOOTSECT.xxx in the root directory. The extension of this file is
- determined by the previously installed operating system; in the case
- of MS-DOS, the extension would be .DOS; in the case of OS/2 version
- 1.x, the extension would be .OS2. It then copies a Windows NT startup
- utility called the Boot Loader into the boot sector.
-
- When the system is restarted, this utility presents you with a choice
- of which operating system to start. Once you have made your selection,
- the Boot Loader locates either the Windows NT bootstrap or the
- BOOTSECT.xxx file, and turns over control.
-
- If you install another operating system or upgrade to another
- operating system after installing Windows NT, that process generally
- replaces the Boot Loader in the boot sector, destroying the dual boot
- opportunity, and effectively preventing Windows NT from starting
- (booting).
-
- To recover from this, you can use the Emergency Repair Disk. Choose
- Verify Boot Files from the main menu.
-
- Note: MS-DOS 6.0 upgrade leaves the NT Boot Loader intact--MS-DOS 6.0
- OEM Setup does not.
-
- Additional reference words: 3.10 win32 boot setup winset overwrites
- KBCategory:
- KBSubCategory: INTROP
-
- =============================================================================
-
- 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.