Internal Pointing Device Conflicts with Mouse or IntelliMouse

• Microsoft IntelliPoint software versions 2.0, 2.1, 2.2

SYMPTOMS

When you install the Microsoft IntelliPoint software on a computer with an internal pointing device (such as a touch pad or trackball), when you use a Microsoft Mouse or Microsoft IntelliMouse, you may experience any of the following symptoms:

• You may receive the following error message when you load the mouse driver:

  Driver Not Installed -- Microsoft Mouse not found.

• The mouse pointer may move erratically.



• The mouse pointer may not respond to mouse movement.



• The computer may not respond to mouse clicks.



• The internal pointing device or the external mouse may stop working after a few minutes of use.



• The external mouse may not work.

CAUSE

This behavior can occur if the internal pointing device conflicts with the the external mouse.

RESOLUTION

To work around this issue, disable the internal pointing device on your computer, or connect the external mouse to an available COM port using the serial adapter included with the Microsoft mouse.

For information about how to disable the internal pointing device on your computer, consult the printed documentation provided with your computer or contact the computer's manufacturer.

STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article.

MORE INFORMATION

This issue is caused by a limitation of the PS/2 port. While a PS/2 port is able to receive only six bits of data at a time, the internal pointing device sends three bits of data through the PS/2 port in addition to the four bits of data sent by the external mouse.

When the IntelliPoint software is installed, Windows detects the external mouse as a mouse with a wheel, and cannot detect it as a standard 2-button mouse again.

For more information about the symptoms described in this article, please see the following article in the Microsoft Knowledge Base:

Q158324 Microsoft IntelliPoint 2.0 Readme.txt File

Additional query words: 2.00 2.10 2.20 intelli mouse point laptop notebook

Keywords          : kbhw intellipoint kbimu 
Version           : WINDOWS:2.0,2.1,2.2
Platform          : WINDOWS 
Issue type        : kbbug 

Last Reviewed: April 26, 1999