Download Android 7.1 stock firmware for W95 TV Box from here and here. Download a newer firmware from here. Download Amlogic USB Burning Tool v2.0.8 from here or download Amlogic Burn_Card_Maker v2.0.2 from here.
Archive: How to flash W95
Model: W95 TV Box
Image file size: 444 MB
OS: Android Nougat 7.1.2
Platform: Amlogic S905W
Inside archive: firmware + Amlogic S912 burnning tool + Guidance.docx
Build number: p281-user 7.1.2 NHG47L 20170923 test-keys
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.