The EMUC-B201 VCom Port Windows driver typically refers to a virtual COM port driver used for communication between your PC and an embedded or external device that uses the EMUC-B201 hardware, which is often a USB-to-serial adapter or interface. The VCom (Virtual COM) Port driver creates a virtual COM port on your computer, allowing software applications to communicate with the device as though it were connected via a traditional serial (RS-232) port, even though it's actually using USB.