Microsoft KB Archive/177364

= IntelliMouse Wheel Stops Working After Installing Service Pack 3 =

Article ID: 177364

Article Last Modified on 10/12/2007

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APPLIES TO


 * Microsoft SideWinder Mouse
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows NT Server 4.0 Enterprise Edition

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This article was previously published under Q177364



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 :\i386\I8042prt.sys \System32\ drivers\I8042prt.sys

where is the drive letter assigned to your CD-ROM drive, and  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: 159060

TITLE : Mouse Cursor Freezes or Fails with Microsoft IntelliMouse

Additional query words: scroll rotate spin sp3

Keywords: KB177364

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