I've looked on various websites that deal with drivers, but this device doesn't appear to be supported in terms of downloading resource files (drivers, tools, manual, documentation, brochures, etc).
This means you will have to take advantage of the Windows Update, but for that to happen, an Internet connection is required.
The wired Internet connection is require for this process. Once the driver is installed through Windows Update, you can disconnect the wired Internet and continue using the WiFi one.