There are different methods on how to delete COM ports in use. In this article, we will show you how to do this. In such a scenario, you are forced to delete COM ports in use in Windows or reassign a used COM port to a different device. For example, some adapters may reserve up to 30 or even more COM ports.
Another issue may appear when some specific devices take too many ports. For example, such an app may work well with COM1 to 9, but fail if there are no free COM ports below COM10. Most of the time this is not a big deal or problem unless a user tries to run some legacy software that has trouble working with COM-ports higher than 9. Also, each port is assigned exclusively for one device and remains occupied (Windows shows it as “in use”) even if the device itself is not plugged in anymore. Every COM port has its number from 1 to 255.
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