DOCUMENT:Q177364  10-AUG-2001  [winnt]
TITLE   :IntelliMouse Wheel Stops Working After Installing Service Pack 3
PRODUCT :Microsoft Windows NT
PROD/VER:WINNT:4.0
OPER/SYS:
KEYWORDS:kbtool

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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 install Windows NT 4.0 Service Pack 3, the functionality of your
Microsoft IntelliMouse wheel may be disabled.

CAUSE
=====

This behavior occurs because the I8042prt.sys file is replaced when you install
Service Pack 3. The I8042prt.sys file is the driver that controls the keyboard
and PS/2 mouse port.

RESOLUTION
==========

To resolve this issue, rename the I8042prt.sys file in your
%SystemRoot%\System32\Drivers folder, replace it with the original version, and
then restart your computer. To replace the I8042prt.sys file, use either of the
following methods:

 - If you created an uninstall folder during the installation of Service Pack 3,
   copy the I8042prt.sys file from the %SystemRoot%\$NtServicePackUninstall$
   folder to the %SystemRoot%\System32\Drivers folder.

 - If you did not create an uninstall folder during the installation of Service
   Pack 3, expand the I8042prt.sys file from your Windows NT 4.0 CD-ROM by
   typing the following command at a command prompt

   " expand <drive>:\i386\I8042prt.sys <windows_nt>\System32\
   drivers\I8042prt.sys " (without the quotation marks)

   where <drive> is the drive letter assigned to your CD-ROM drive, and
   <windows_nt> is the name of the folder in which Windows NT is
   installed.

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

For more information about the I8042prt.sys file included with Service Pack 3,
see the following article in the Microsoft Knowledge Base:

ARTICLE-ID: Q159060
TITLE : Mouse Cursor Freezes or Fails with Microsoft IntelliMouse


Additional query words: scroll rotate spin sp3

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Keywords          : kbtool 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTSEntSearch kbWinNTSEnt400 kbWinNTS400search kbWinNTS400
Version           : WINNT:4.0

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