The RDA COM Enumerator is a driver used for enabling communication between Windows and certain hardware devices, often related to mobile or embedded systems. It's commonly associated with debugging or testing tools, such as those used for Android development. To install it, download the driver from the manufacturer's website or the relevant software package, and then run the installer. You may need to allow Windows to recognize it via Device Manager if it doesn't install automatically. What device or software are you trying to use it with?