DOCUMENT:Q174623  09-AUG-2001  [winnt]
TITLE   :Error Message After Upgrading Windows NT for Second Processor
PRODUCT :Microsoft Windows NT
PROD/VER::4.0
OPER/SYS:
KEYWORDS:kbenv kberrmsg

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The information in this article applies to:

 - Microsoft Windows NT Workstation version 4.0 
 - Microsoft Windows NT Server version 4.0 
 - Microsoft Windows NT Server, Enterprise Edition version 4.0 
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SYMPTOMS
========

After you upgrade Windows NT to support a second processor, you may receive
either of the following error messages:

 - If the Operating System is on a file allocation table (FAT) partition, you
   receive the following error message:

   Windows NT could not start because the following file is
   corrupt:%winnt%\system32\drivers\fastfat.sys

 - If the Operating System is on a NTFS file system (NTFS) partition:

   Windows NT could not start because the following file is
   corrupt:%winnt%\system32\drivers\ntfs.sys.

CAUSE
=====

This behavior can be caused by a file mismatch between the files from Windows NT
and those from an installed Service Pack.

RESOLUTION
==========

To resolve this issue, use one of the following methods:

If You Have Not Yet Restarted After the Upgrade
-----------------------------------------------

Reapply the latest Service Pack before you restart the computer.

If You Have Already Restarted After the Upgrade
-----------------------------------------------

Refer to the following article.

For additional information about which files to replace, click the article number
below to view the article in the Microsoft Knowledge Base:

   Q156358 How to Manually Add Support for a Second Processor

Additional query words: hal.dll

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Keywords          : kbenv kberrmsg 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTSEntSearch kbWinNTSEnt400 kbWinNTS400search kbWinNTS400
Version           : :4.0
Issue type        : kbprb

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