Factory reset for Lenovo Tab 10 tablet wont work in User to User Help Posted April 10, 2017 · Edited April 10, 2017 by terry1966 · Report reply when you do upgrades, the instructions tell you to always have the device plugged into a power source, there is a reason for that and it's because when you upgrade what it's doing is over writing the old os with a new one but if it loses power half way through installing the upgrade then the device is left with half of the new os and half of the old os on there which means it no longer has a full set of instructions on how to boot the device to the main screen. when you powered off the machine half way through the upgrade because you thought it had frozen, what you're doing is exactly the same thing as if it had run out of power during the upgrade and that is why you were left with a device that no longer booted. the only way to fix it is to reinstall the os again from scratch, which means connecting it to a computer and using a special program to flash a new os to it. now i don't think lenovo supply a new os download that you can then use to put on your device and why you're left with the option of returning it so they can fix it or as nigel said maybe installing a stock android os from google onto it. personally seeing how it's so new i'd return it and either get a replacement or get them to fix it, if it was out of warranty then i'd look into how to install a stock android os on there.