Download latest Android KitKat 4.4.4 stock firmware for Chuwi Vi10 Pro Dual OS tablet from here or from here. Download another Chuwi firmware from here.
Archive name: VI1064G海外版技德软件安卓（序列号为221511xxxxxx开始的）
Archive size: 577 MB
Model: Chuwi Vi10 Pro Dual OS tablet
Platform: IntelBay Trail Z3736F
Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.