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Q154785: WinNT 3.51 Service Packs (SPs) Incorrectly Update Newer SPs

Article: Q154785
Product(s): Microsoft Windows NT
Version(s): 3.51
Operating System(s): 
Keyword(s): kbnetwork
Last Modified: 10-AUG-2001

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The information in this article applies to:

- Microsoft Windows NT Workstation version 3.51 
- Microsoft Windows NT Server version 3.51 
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SYMPTOMS
========

It is possible to replace a newer version of a Service Pack for Windows NT 3.51
with an older version. This is not intended behavior.

CAUSE
=====

Version information was not updated for Service Packs 1, 2, 3 and 4 for Windows
NT 3.51. It is possible for any of these service packs to install over a newer
service pack.

RESOLUTION
==========

Windows NT will now detect that a newer-version Service Pack is installed and
not install an older Service Pack over the newer version.

Note: If Service Pack 3 is installed over Service Pack 4, please refer to the
following article in the Microsoft Knowledge Base:

Q148262Removing Windows NT 3.51 SP 4 May Cause Logon Failures

STATUS
======

Microsoft has confirmed this to be a problem with Windows NT version 3.51
Service Packs 1, 2, 3, and 4. This problem was corrected in the latest Windows
NT 3.51 U.S. Service Pack. For information on obtaining the Service Pack, query
on the following word in the Microsoft Knowledge Base (without the spaces):

  S E R V P A C K

Additional query words: prodnt

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Keywords          : kbnetwork 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNT351search kbWinNTW351search kbWinNTW351 kbWinNTSsearch kbWinNTS351 kbWinNTS351search
Version           : 3.51

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