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Message: [QUOTE="Ian, post: 14283332, member: 1"] Do the used ports appear in device manager? If so, you may just be able to right click and uninstall it. You may need to go to View > Show Hidden devices to show all ports. If you load up the Powershell prompt and run the command below, can you please let me know the resulting ports please, as it may give a clue as to why they are still there. If a Phone/etc... was assigned a COM port, it should be released again when disconencted. [CODE]Get-WMIObject Win32_SerialPort | Select-Object Name,DeviceID,Description[/CODE] As a last resort, you could try using this tool (I've not tried it, but it looks like it'll do it): [URL unfurl="true"]https://www.uwe-sieber.de/misc_tools_e.html[/URL] It's called "COM Name Arbiter Tool" about halfway down the page. [/QUOTE]