Microsoft KB Archive/175489

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Serial Pointing Device Not Detected by Windows NT

Article ID: 175489

Article Last Modified on 8/17/2005


  • Microsoft BallPoint Mouse 1.0 Standard Edition
  • Microsoft BallPoint Mouse 2.0 Standard Edition
  • Microsoft Easyball
  • Microsoft IntelliMouse 1.0
  • Microsoft Mouse
  • Microsoft Mouse 2.0
  • Microsoft Home Mouse 2.0
  • Microsoft Windows NT 3.51 Service Pack 5
  • Microsoft Windows NT 4.0
  • Microsoft IntelliPoint 2.0
  • Microsoft IntelliPoint 2.0a
  • Microsoft IntelliPoint 2.1

This article was previously published under Q175489


When you connect a serial pointing device to your Windows NT-based computer, Windows NT may not detect the pointing device.


This behavior can occur if a serial pointing device is already connected to a serial (COM) port. Windows NT detects only one serial pointing device.


The second pointing device is not detected because the IntelliPoint and Windows NT drivers search for only a single serial pointing device connected to the computer. When a serial pointing device is detected, the IntelliPoint and Windows NT drivers stop searching the serial (COM) ports for additional pointing devices.

Additional query words: found seen winnt

Keywords: kbhardware KB175489