The Gzcyc No 9700 (often recognized by the system as the RD9700 or KY-RD9700) is a budget-friendly USB-to-Ethernet adapter designed to provide a hardwired internet connection to devices without a built-in LAN port.

Did your adapter come with a small driver CD, or are you relying entirely on web downloads?

  1. Do not use automatic driver updaters.
  2. Download from GitHub or the OEM support site (not random driver libraries).
  3. Disable driver signature enforcement if you see Code 52.
  4. Install manually via Device Manager or INF file.
  5. Test with a serial terminal program.

Find the device (often under Other devices with a yellow exclamation mark). Right-click the device and select Update driver. Choose Search automatically for drivers.

2. Direct Download Links (If Manual Install Required) If Windows 11 does not automatically recognize the device, try the official sources for the likely matches: