How to Clear COM Port List - Dynamax
How to Clear COM Port List
-- When COM port number reaches 256
Log in your PC as administrator. From START menu, right click "Command
Prompt" and select "run as administrator" option. Command Prompt window opens.
In Command Prompt, type "set devmgr_show_nonpresent_devices=1", hit ENTER. Then type "Start devmgmt.msc", hit ENTER. Device Manager window opens.
Click "View" in the menu and select "Show hidden devices".
Expand "Ports" to list all COM ports used.
Right click on one of the greyed out ports and select "Uninstall".
In the popup window, DO NOT check "delete the driver software for this device" box.
Click "OK" button. The unused COM port is removed. Repeat the steps until all greyed out COM ports are re-
moved.
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