DOCUMENT:Q104429  17-JAN-1994  [W_NT]
TITLE   :Installing MS-DOS Version 6.0 After Windows NT is Installed
PRODUCT :Windows NT
PROD/VER:3.10
OPER/SYS:WINDOWS
KEYWORDS:

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The information in this article applies to:

 - Microsoft Windows NT operating system version 3.1
 - Microsoft Windows NT Advanced Server version 3.1
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SUMMARY
=======

If you install MS-DOS version 6.0 on a computer that has Windows NT
installed, the Windows NT boot sector may be erased, which prevents
Windows NT from loading.

Windows NT and MS-DOS 6.0 can be on the same computer; however, if
MS-DOS 6.0 is installed after Windows NT, then you may need to use the
following procedure to restore the Windows NT Flex Boot Loader.

MORE INFORMATION
================

To repair the Windows NT boot sector, do the following:

1. Start your system using Disk 1 - Setup Disk for Floppy Disk
   Installation. (Or Disk 1 - Setup Disk for CD-ROM Installation if
   Windows NT was set up using CD-ROM.)

2. When prompted for Setup options, press R for Repair.

3. When prompted to do so, insert the Emergency Repair Disk that was
   originally created for this computer.

4. Reinsert Disk 1 when prompted. (This is the same disk with which
   you started your system.)

5. You will see three selections. All three will be selected by
   default. Using the SPACEBAR to select/clear the options, clear the
   selection of all options EXCEPT Verify Boot Files On Your C: Drive.
   This should be the only option that has an "X" in front of it.

6. Select Continue and press the ENTER key.

The software will run CHKDSK and verify startup files and the Windows
NT boot sector will be rebuilt. You will be prompted to restart your
computer when the procedure is complete.

When you restart your system, the Windows NT Flex Boot Loader screen
will appear, allowing you to choose between MS-DOS version 6.0 or
Windows NT.

Additional reference words: 3.10
KBCategory:
KBSubcategory: mdos

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