PS/2 ports are unexpectedly reported in Device Manager when you use a Microsoft pointing device

Microsoft Windows 98, Microsoft Windows Millennium Edition, Windows XP, Windows Vista, or Windows Server 2008

When you view the Device Manager tab in the System Properties dialog box on a Windows 98-based computer, a Windows Millennium Edition-based computer, a Windows XP-based computer, or a Windows Vista-based computer, you may experience the following symptoms:

• A PS/2 Compatible Mouse Port may appear under the Mouse branch, even if your mouse is connected to the USB port in the computer. Additionally:
  • A yellow spot with an exclamation mark may appear on the PS/2 Compatible Mouse Port icon. When you click PS/2 Compatible Mouse Port and then click Properties, you receive the following error message on the General tab:
    This device is either not present, not working properly, or does not have all the drivers installed. (Code 24)
    
    Try upgrading the device drivers for this device.
  • Interrupt Request (IRQ) 12 may be assigned to the mouse port.
• A Standard 101/102-Key or Microsoft Natural Keyboard may appear under the Keyboard branch, even if your keyboard is connected to the USB port on the computer. Additionally:
  • IRQ 01 may be assigned to the keyboard.
  • Input/Output (I/O) Range 0060-0060 may be assigned to the keyboard.
  • I/O Range 0064-0064 may be assigned to the keyboard.

Microsoft Windows 2000

When you view the Device Manager tab in the System Properties dialog box on a Windows 2000-based computer, you may experience the following symptoms:

• A PC/AT PS/2 Keyboard (84-Key) may appear under the Keyboard branch, even if your keyboard is connected to the USB port in the computer.
• A yellow spot with an exclamation mark may appear on the PC/AT PS/2 Keyboard (84-Key) icon. When you click PC/AT PS/2 Keyboard (84-Key) and then click Properties, you receive the following error message on the General tab:
  The device cannot start. (Code 10)
  
  Try updating the device drivers for this device.
• IRQ 01 may be assigned to the keyboard.
• I/O Range 0060-0060 may be assigned to the keyboard.
• I/O Range 0064-0064 may be assigned to the keyboard.

This behavior is by design.

To work around this behavior, contact the computer manufacturer for information about how to configure the BIOS settings for the computer to disable the PS/2 mouse port or PS/2 keyboard port in the computer.

Note If you have to use a PS/2 keyboard to configure the BIOS settings for the computer or to type commands in MS-DOS mode, Microsoft recommends that you do not disable the PS/2 keyboard port in the BIOS settings for the computer.

When Windows reports the status of a PS/2 Compatible Mouse Port, a Standard 101/102-Key or Microsoft Natural Keyboard, or a PC/AT PS/2 Keyboard (84-Key), it reports the status of the port itself. It does not necessarily report the status of any device connected to the port.

If a PS/2 mouse port or PS/2 keyboard port is installed on the computer, and the port is enabled in the BIOS settings for the computer, Windows reports the status of the port on the Device Manager tab in the System Properties dialog box.