Why, after I updated my keyboard driver to the new Microsoft Natural Keyboard Pro driver, did my keyboard and mouse stop working?

A. The latest Natural Keyboard Pro driver supports only the keyboard's USB socket (even though the keyboard also has a PS/2 connection). When installing the new driver, the setup program disables the i8042 port and enables Human Interface Device (HID) support. The i8042 service must be running for a PS/2 keyboard and mouse to function.

Unless you can log on (which, unless you have enabled autologon, might be impossible), try booting into the Last Known Good configuration by pressing F8 at the boot menu to undo the change. If the Last Known Good configuration doesn't resolve the problem, you can change the following registry values remotely or by using third-party tools:

  • Change HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\i8042prt\Start to 1
  • Change HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\kbdhid\Start to 4

If you can't edit these registry settings, you need to use the Recovery Console (RC) by performing the following steps:

  1. Boot the computer from the Windows installation media, and press F10 when you see the Welcome to Setup screen to start the RC.
  2. Type the following command to navigate to the system32\drivers folder:
      cd \system32\drivers 
  3. Type the following command to back up the current enhanced keyboard driver:
      ren kbdhid.sys kbdhid.org 
  4. Type the following command to copy the i8042 port driver over the enhanced keyboard driver:
      copy i8042prt.sys kbdhid.sys 
  5. Type 'exit' to quit the RC. This step will cause the system to reboot.
  6. Log on as an administrator, and reinstall the Standard 101/102-Key or Microsoft Natural PS/2 Keyboard drivers by clicking the Keyboard applet in Control Panel, selecting the Hardware tab, clicking Properties, selecting the Driver tab, and starting the Update Driver Wizard. Your mouse will not function until you perform this step.
  7. Install the full Microsoft IntelliType Pro 1.1 update or later drivers for Windows 2000 that support the Microsoft Natural Keyboard Pro.
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