Can't authorise android lenovo tablet in USB debugging mode I have Lenovo YOGA Tablet 2 830LC X86.
Rescue and Smart Assistant tool is a software to work with this tablet.
When i activate USB-Debugging in tablet i face the error below in Rescue and Smart Assistant tool.

Unauthorized is because after activating USB-Debugging mode in tablet and connecting my tablet to PC, there is no popup asking me if i want to trust this PC, which i have to agree (permanently).
By deleting the adbkey file found in C:\Users\[Username]\.android folder the permission dialog did n't appear on my device.
What should i do to fix this issue?

Edit after comment :

I am using USB charging cable.
I have windows 7
USB OEM driver for Lenovo &gt; When i connect
lenovo tablet to pc a pop up shows up on pc to install usb driver.
So i installed it &amp; after that i can see tablet folders.
But i did n't install any other things.
Have you reset the USB authorization on
the device too (usually inside Developer options) &gt; Is this your
mean revoke USB debugging authorization? If yes i did it several times.
Is the device detected by ADB (call adb devices on command prompt)
I found a adb.exe in this path : C:\MagicPlusMini\app
After enter adb devices command it founds : Baytrail6F284E37 offline
I found another adb.exe
Here is the command prompt :
C:\Program Files (x86)\Rescue and Smart Assistant&gt;adb devices
List of devices attached adb server is out of date. killing...
daemon started successfully
Baytrail6F284E37 unauthorized
Resolution
Possible solutions if adb devices shows a device as unauthorized:

C:\Users\JohnDoo&gt;adb devices
List of devices attached
17310D821D  &gt; unauthorized


Disconnect USB between PC and device
Stop adb server by entering adb kill-server in command window
On device use Revoke USB debugging authorizations in Developer Options
On PC delete adbkey file in user directory, for example C:\Users\JohnDoo\.android
Reconnect the device to the PC
Open a command window and enter adb devices. Watch the device's screen for any Authorization message and allow the connection.

The device should now show as device:

C:\Users\JohnDoo&gt;adb devices
List of devices attached
17310D821D  &gt; device

If the above does not help, re-installing adb and or USB drivers may help.