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How do I find the device which has Com Port X reserved - want to reclaim the port num for different device

Fresh5 days ago
Mar 15, 202634530 views
Confidence Score0%
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Problem

I added a 4 port pci serial card to my windows 7 PC. I want to assign them COM1-4. I know how to change the COM Port Number when the com port number is not already in use. In my case, COM4 is taken by something... probably some type of usb to serial device I connected at some point. If I knew what …

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Fix for: How do I find the device which has Com Port X reserved - want to reclaim the port num for different device

Low Risk

"Method Using Elevated Command Prompt" From Start Menu type cmd into search bar right click on cmd.exe and select run as administrator at UAC select yes to allow Windows Command Processor Program to make changes. At the Command prompt type SET DEVMG…

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