Please see THIS POST first on how to install the drivers for Rockchip.
Then see THIS POST on how to Flash your device with the Firmware flash tool.
The EntertainmentBox Firmware Downloads utilities listed here can cause permanent damage to your product if applied incorrectly. Before downloading any firmware updates, verify the firmware you are downloading is appropriate for the specific model number of your product. If you have any doubts, contact Customer Service for guidance.We will not and can not be held responsible for incorrect use.