Knowledge Base

IntelliMouse Wheel Stops Working After Installing Service Pack 3

Article ID: 177364

Article Last Modified on 10/12/2007

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

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 <drive>:\i386\I8042prt.sys <windows_nt>\System32\ drivers\I8042prt.sys

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: 159060
TITLE : Mouse Cursor Freezes or Fails with Microsoft IntelliMouse

Additional query words: scroll rotate spin sp3

Keywords: KB177364