The USB Modem Enumerator is a device driver used by Windows to support USB modems. It allows the operating system to recognize and manage modems that are connected to the computer via USB ports. This driver is responsible for facilitating the communication between the USB modem (such as those used for dial-up internet or cellular data) and the computer, enabling features like sending and receiving data over a network.
When you plug a USB modem into your computer, Windows typically detects it and installs the required drivers, including the USB Modem Enumerator driver. If Windows cannot automatically detect the modem or its driver, you may need to install it manually.