Mouse and keyboard stop working after you install the Windows NT 4.0 Security Rollup Package

After you install the Windows NT 4.0 Security Rollup Package (SRP) or the MS04-011: Security Update for Microsoft Windows, the mouse and keyboard may no longer function.

For additional information about the SRP, click the article number below to view the article in the Microsoft Knowledge Base: For additional information about the Security Update, click the following article number to view the article in the Microsoft Knowledge Base:

This problem can occur if you install the SRP or Security Update on a computer that is running Microsoft IntelliPoint 2.0.

To resolve this issue:

1. If your system partition uses the FAT file system, restart your computer by using a bootable MS-DOS or Windows floppy disk. If your system partition uses the NTFS file system, use one of the following procedures:
   • Install a second copy of Windows NT 4.0, and then boot to that parallel installation.
     -or-
   • Use a Windows 2000 CD-ROM to boot to the Recovery Console.
   For additional information about parallel installations, click the following article number to view the article in the Microsoft Knowledge Base:
   259003  (http://support.microsoft.com/kb/259003/ ) How and why to perform a parallel installation of Windows NT 4.0
   For additional information about the Windows 2000 Recovery Console, click the article number below to view the article in the Microsoft Knowledge Base:
   229716  (http://support.microsoft.com/kb/229716/EN-US/ ) Description of the Windows 2000 Recovery Console
2. Change to the %SystemRoot%\System32\Drivers folder.
3. Rename Msi8042.sys to Msi8042.old. Rename the I8042prt.sys file to Msi8042.sys.
4. Restart the computer.

Install the latest version of IntelliPoint software to prevent this problem from occurring. IntelliPoint is available from the Download Drivers link on the following Microsoft Web site: