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Cable Matters 202013 / 202023 / 202026 USB Ethernet Adapters Having Connection Issues after Windows Reboot

Article ID: 126
Last updated: 07 May, 2020

Symptom 1: Ethernet does not work and the adapter is not recognized by the computer after a Windows reboot, or the adapter is not correctly recognized as an Ethernet adapter. Instead, it is recognized as a CD ROM or storage device

Typically, unplugging and plugging the adapter back in will let your computer recognize it but the issue may happen again on another Windows system reboot. To solve the problem fundamentally, please follow the steps below: 

1. Download the RtPGtoolUI software here.

2. Connect the power cable into your computer and make sure your computer is charging.

3. Plug the USB to Ethernet Adapter into the computer. Disconnect the Ethernet cable from the adapter.

4. Run RtPGtoolUI software.

5. Click the 'Dump' button to see the current setting in the firmware as shown below.

6. Make sure the Mac Address of 'Device Select' is the same as shown in 'CURRENT' (The CURRENT text box does not display the ":")

7. Check to see whether SPI_FLASH_EN is selected.

8. Unselect the 'SPI_FLASH_EN' checkbox, and then click the 'Program' button to make the change in the firmware.

9. When the 'Program' process is successfully completed, the RESULT will display 'PASS'

10. Double-check to make sure the Mac Address didn't change.

Symptom 2: Adapter is still not recognized by a Windows 7 computer

Windows 7 may need to install the driver after the flash was disabled. Please download the driver here and install it manually.

Article ID: 126
Last updated: 07 May, 2020
Revision: 6