Blog.BrianLeeJackson.com » COM http://blog.brianleejackson.com Mon, 21 Jun 2010 17:05:38 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 How to Delete Or Clear COM Ports In Use http://blog.brianleejackson.com/how-to-delete-or-clear-com-ports-in-use http://blog.brianleejackson.com/how-to-delete-or-clear-com-ports-in-use#comments Wed, 29 Jul 2009 07:41:09 +0000 Brian Jackson http://blog.brianleejackson.com/?p=427 If you are having trouble with your COM ports stacking up because they are in use, these brief steps below will help you clear them out. (I found myself the other day needing to connect via a USB to Serial adapter to a server and noticed that 35 COM ports showed in use. Somehow the COM ports were not getting cleared out.)
COM-Ports

COM-Ports

Step #1

One thing is to see if hidden devices are taking up the ports:
Click Start > All Programs > Accessories and then click Command Prompt.

Step #2

Type set devmgr_show_nonpresent_devices=1 in the Command Prompt and then press Enter.

Step #3

Type cd \Windows\system32 in the Command Prompt and then press Enter.

Step #4

Type start devmgmt.msc in the Command Prompt and then press Enter.

Step #5

Click View > Show hidden devices. This will display devices that are not connected to your computer.

Step #6

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).

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