How to Flash an RK3066 Tablet with New Firmware
I. Download the RKBatch Tool & Image for your Tablet from RockchipFirmware.com:
Our sister site, www.rockhipfirmware.com
now maintains all of our official firmware downloads. Please visit them to obtain the latest firmware for your rockchip based device!
II. Read and Follow the guide here:
TNT RK3066 Firmware Flashing Guide
View Top Notch Tablets Firmware Support Forum (Thanks FlashMyAndroid!)