You must install the official Rockchip DriverAssitant on your Windows PC.
Are you currently stuck on a in the tool? Rk Android Tool V2.7.1
Troubleshooting : If device shows as Unknown Device , uninstall USB drivers, reboot, and manually force usbser.sys with Rockchip INF. You must install the official Rockchip DriverAssitant on
While Rk Android Tool is powerful, it requires caution: uninstall USB drivers
If the tool hangs or errors at this stage, it usually means the tool cannot talk to the device's flash memory properly. Common fixes include: Switch to Maskrom Mode