Use kingo route.
Make sure you have your lenovo in developer mode, along with usb debugging enabled on the tab.
Go to System settings on your tablet.
Tap on about tablet.
Tap on the build number in rapid succession to enable developer mode.
Install Kingo on your pc, and the kningo app on the android tab.
Connect the Android tab via usb to the pc.
Right click on Kingo route in windows and run as an Administrator.
Let Kingo do it`s stuff.
Disconnect the Tab from usb.
Power it completely off.
And restart from a fresh power cycle on, of the Tab.
Job done.
Install super user verify on the tab, routed status.