Download latest Android Lollipop 5.1 stock firmware for Lenovo Yoga Tab 3 Pro 10 YT3-X90F from here or here.
Archive name: YT3-X90F_USR_S100201_1601131721_WW24_CN
Archive file size: 971 MB
Support: Intel Atom x5-Z8500
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.
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