Microsoft KB Archive/188572

= Serial Mouse Stops Working After Changing COM Port Resources =

Article ID: 188572

Article Last Modified on 1/23/2007

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APPLIES TO


 * Microsoft Windows Millennium Edition
 * Microsoft Windows 98 Standard Edition
 * Microsoft Windows 95

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This article was previously published under Q188572



If this article does not describe your hardware-related issue, please see the following Microsoft Web site to view more articles about hardware:

http://support.microsoft.com/default.aspx/w98?sid=460



SYMPTOMS
After you change the resources for a COM port to which a serial mouse is connected, the mouse may stop working.

You may also see an exclamation point in a yellow circle in Device Manager with the following message when you view the properties for the mouse:

This device is either not present, not working properly, or does not have all the drivers installed. (Code 24).



CAUSE
This behavior can occur if you change the resources for a COM port to which a serial mouse is connected to non-standard settings.

The standard resource settings for COM ports are:

  I/O Address   IRQ -  03F8           4 02F8          3 03E8          4 02E8          3



RESOLUTION
To resolve this issue, use either of the following methods:

Method 1
Remove the serial mouse and COM port in Device Manager, and then restart the computer. To do so, follow these steps:


 * 1) Click Start, point to Settings, click Control Panel, and then double- click System.
 * 2) Click the Device Manager tab.
 * 3) Click the serial mouse, and then click Remove.
 * 4) Double-click the Ports (COM & LPT) branch to expand it.
 * 5) Click the COM port to which the mouse is connected, and then click Remove.
 * 6) Click OK.
 * 7) After the COM port is detected again, restart the computer.

Method 2
You can resolve this issue by setting the COM port back to its original resource settings.



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

Additional query words: HWPORTS

Keywords: kbenv kbprb KB188572

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