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Microsoft KB Archive/255049

From BetaArchive Wiki

Serial Mouse Functionality Lost in Windows 2000


The information in this article applies to:

  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional
  • Microsoft Windows 2000 Server


You may lose functionality of your serial mouse in Windows 2000.


This behavior can occur if your mouse is attached to a serial switch box.


To work around this behavior, use any of the following methods:

Method 1

Change a value in the Msmouse.inf file to turn off removal detection:

  1. Open the %SystemRoot%\Inf\Msmouse.inf file in Notepad.
  2. In the [Ser_Inst.HW.AddReg] section, remove the semicolon (;) from the following line:
  3. Save the file, and then quit Notepad.
  4. In Control Panel, double-click System, and then click the Hardware tab.
  5. Click Device Manager, and then remove the serial mouse.
  6. On the Action menu, click Scan For Hardware Changes to reinstall the mouse.

Method 2

NOTE: This method can be used only during initial installation because the values exist in the Hardware key, which is built during Windows 2000 Setup and cannot be accessed after Windows 2000 is installed. Since a setup information (.inf) file is being modified, Setup must be run from the I386 folder.

Using a text editor (such as Notepad), add the following line in the [Ser_Inst.HW.AddReg] and [LogiSer_Inst.HW.AddReg] sections of the Msmouse.inf file:


NOTE: This setting locks the serial port for use only with a serial mouse. If you want to change the functionality of the serial port at a later time, you need to install Windows 2000 again.

Method 3

Restart your computer.


Windows 2000 does not provides a polling method for detecting the temporary removal or loss of serial devices. If the switch box is designed to disconnect and reconnect the serial port, the computer assumes the device is removed.

Additional query words: sermouse msmouse trackball

Keywords : kbhw KBW2KHOME
Issue type : kbprb
Technology : kbwin2000AdvServ kbwin2000AdvServSearch kbwin2000Serv kbwin2000ServSearch kbwin2000Search kbwin2000ProSearch kbwin2000Pro kbWinAdvServSearch

Last Reviewed: October 24, 2000
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