How to determine what is using com ports?

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27th Mar 2007

Hi Gang,

I have a Treo with bluetooth and am using a Kensington Bluetooth device on
my HP with Windows XP SP2. When I try to Hotsynch, I receive an error that
com port 4 is in use by another application. I can not figure out what might
be using com port 4. My device manager only shows LPT1 in the ports area.

The Hotsynch was working the last time I synched up, but that was a month
ago and I don't remember every change I might have made to the computer since
then. System restore has never worked on this computer.

Thanks for your help.

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