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Dedicated COM port, stop OS from sending data?

  • Comm Port
  • Devices
  • Windows XP
Last response: in Windows XP
September 9, 2005 10:44:06 PM

Archived from groups: microsoft.public.windowsxp.general (More info?)

I'm attaching seral devices to a WindowsXP system (COM ports via
Prolific USB-Serial) device. I've had two probems:

1) Windows thinks the GPS is a serial mouse, used /NoSerialMouse switch
and that got fixed.

2) Now I have a serial device that usesed the first byte sent to it to
autobaud, it get's confused since windows appears to send something out
the port.

?? Is there a way to flag these ports as allocated for a user program
to run later, ie. no probing?


More about : dedicated port stop sending data

October 7, 2008 1:17:05 AM


For several times I was (and my customers, too) a vitim of 'crazy mouse jumper', but I tired to try disable the false mouse device at Control Panel at Vista. So, I develop a small and simple utility to help fix it: NoSerialMouse. It's free and works with all Windows versions, including Windows 2000, Windows XP and Vista 64 and 32. Download it, here:

More detail (sorry, portuguese only) at:

I hope that it helps someone.

Marcio Wesley Borges