Rkdevtool No Devices Found |link| Page

Do you see listed in your Windows Device Manager?

RKDevTool will only recognize your device if the Rockchip SoC is booted into a specific flashing mode: or MASKROM mode . If your device is booting normally into Android or Linux, the tool will ignore it. Method A: The Hardware Button Combo (Loader Mode) Completely power off your Rockchip device. rkdevtool no devices found

Click the button first. This cleans out any old, broken driver conflicts. Once uninstalled, click the Install Driver button. Do you see listed in your Windows Device Manager