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Closing Com Ports in Windows XP

I run Windows XP Pro SP II.
Com ports 1,2,3, 4, 5, and 6 are "in use".
I do not see any program using them and I need one of them at least.
How can I identify teh "program" using a com port?
Thank you for your help,
dbessis
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dbessis
Asked:
dbessis
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1 Solution
 
Here2HelpCommented:
Hey.

Right click My Computer then go to Properties. Select the Hardware Tab then click on Device Manager or type 'devmgmt.msc' in to run.

Expand the Ports section to see the list of ports to give you some info about what each port is used for  .
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dbessisAuthor Commented:
Here2Help,
Only port 1 and 7 are listed and also no info on port 1 except "this device is working properly".
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Here2HelpCommented:
What does it say next to 'Location:' above where it says 'This device is working properly'
this will give you some idea as to what hardwarw is using the port. Maybe you could copy and paste what it says into here.
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dbessisAuthor Commented:
There is NO "Location" anywhere. I have "Device Status" or "Device Usage" in the tab "General".
I use Windows XP Pro SP II.
Maybe you are talking about a different version of Windows?
Thank you for your help,

dbessis
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samb39Commented:
This article describes the COMDisable tool. It also contains examples that illustrate how to use COMDisable to do the following:
•      View a list of available COM ports on your computer
•      Disable and enable these COM ports
To download and install the COMDisable tool, visit the following Microsoft Web site:
http://download.microsoft.com/download/b/2/6/b2624690-0fdc-4842-b850-8d21ca893962/COMDisable.msi 

The article is here:

http://support.microsoft.com/default.aspx?scid=kb;en-us;819036
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dbessisAuthor Commented:
samb39,
I downloaded and installed Comdisable.
It lists ONLY com 1 and com 2. No other com ports are listed.
For instance, I know that my modem is using Com 6 and it is not even listed!
Any idea?
Thank you for your help,
dbessis
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dbessisAuthor Commented:
Your information helped a lot even if it did solve all problems.
Thanks.
dbessis
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samb39Commented:
COM PORT IN USE: When a modem that creates a virtual COM port is installed, it will normally be assigned the next unused COM port. If the modem is removed, or if the installation is not completely successful, the COM port assigned with that installation may continue to be identified as 'in use' by Windows, even though it really isn't in use. Each subsequent modem installation removes another COM port from being available.

You can reclaim these 'used' COM ports that really are not in use:
Open the Device Manager by clicking on the button from Control Panel, System, Hardware tab,       
Expand the Ports listing, and double-click your COMMUNICATIONS PORT (normally COM1)
Click on the Port Settings tab, Then, Click the Advanced... button
Then, select the COM Port Number dropdown, and change it a COM port that shows 'In Use' that really isn't in use.

Click OK, and continue past warning about using a used port.

Repeat for each false in use port.

Then, repeat and change the port back to original (COM1) setting.

From this page, which has some screenshots too http://www.modemsite.com/56k/xptip.asp

IF THAT DOESN'T WORK:

set this system environment variable, and then the hidden devices will
work the way it did in Win2000:

set DEVMGR_SHOW_NONPRESENT_DEVICES=1

Acording to reports, you can also start in safe mode to delete the hidden
devices.

From this page:

http://www.thennews.com/b/N13/How%20do%20I%20delete%20spurious%20COM%20ports.php

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dbessisAuthor Commented:
Many thanks. Extremely useful.
dbessis
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