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How do I clear COM ports that are appearing as in use

Anonymous
2012-01-15T19:02:07+00:00

Original Title: Com Port in Use

I have one device plugged into my Lenovo laptop running XP with service pack 3 and it is upto date. When I try to reassign the com port on the the device in the USB port using device manager I find that com ports 2 through 11 are in use. How can I clear these com ports as there nothing using them?

Windows for home | Previous Windows versions | Devices and drivers

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  1. Anonymous
    2012-01-15T21:48:06+00:00

    There is only one device listed under serial ports and it using com 1.

     

    Hi, Sy1001,

    Try the following:

    In control panel, printers folder,

    Right click on Printer

    Select Properties not Server Properties

    Click on Ports Tab

    Do you See COM listings?

    Select and click Delete

    The trick was to open the Command Prompt as administrator and start the Device Manager from the same command prompt.

    1. Right-click “Command Prompt” in Accessories and choose “Run as Administrator”
    2. Enter “set devmgr_show_nonpresent_devices=1″ – without the quotes obviously
    3. Enter “start devmgmt.msc”
    4. In the box that opens, select “Show hidden devices” in the ‘view’ menu.

    Now if you expand the section on COM ports, all the COM ports that have ever

    been created will be displayed, the non present ones being in grey. You can

    uninstall away anything that you don’t want (right click, select uninstall).

    http://www.fettesps.com/how-to-remove-com-ports-which-are-in-use/

    http://answers.microsoft.com/en-us/windows/forum/windows_7-hardware/how-do-i-delete-the-unused-com-ports-in-windows-7/4bb72733-1be0-4168-9ba5-68dcb72d31d9

    40+ people found this answer helpful.
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Answer accepted by question author

  1. Anonymous
    2012-01-16T17:05:10+00:00
    6 people found this answer helpful.
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  1. Anonymous
    2012-01-15T21:19:39+00:00

    There is only one active device in the device manager. When I try to change the com port of this one device I see that com ports 2-11 are "in use". There is no way to uninstall from serial devices that aren't listed.

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  2. Anonymous
    2012-01-15T19:14:23+00:00

    Try run,type: Msinfo32

    Chk the system & hardware for whats actually running.

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  3. Anonymous
    2012-01-15T19:13:04+00:00

    I doubt you have 11 com ports.  Chances are there are multiple drivers installed in device manager.

    If so remove all but the first one.

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