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How to Disable Detection of Devices on Serial Ports
Article ID: 131976 - View products that this article applies to.
This article was previously published under Q131976
This article explains how to modify the Boot.ini file to disable the detection of devices on COM ports.
When you start Windows NT, NTDETECT searches for the pointing device (usually a mouse). In the course of this process, data is sent to the serial (COM) ports. If a serial mouse is detected, Windows NT disables the port so a device driver for the mouse can load instead. If a device is not detected, Windows NT disables the port. A disabled COM port does not display any information in Control Panel Ports.
To disable the detection of devices on COM ports in Windows NT:
/NoSerialMice - Disables the detection of serial mice on all COM ports. /NoSerialMice:COMx - Disables the detection of serial mice on COM x, where x is the number of the port. /NoSerialMice:COMx,y,z - Disables the detection of serial mice on COM x, y and z.
NOTE: The /NoSerialMice option is not case sensitive.
Article ID: 131976 - Last Review: November 1, 2006 - Revision: 2.1