here is final and working solution from lenovo
and thanks for those who share info,,,,
today i solve two tabs
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1. Download A1000FixToo.exe from here:
https://mega.co.nz/#!kV8UXBgQ!6z4vcY...w635DOFw51g-1A
2. drivers and tool inside rar file
3. Open Device Manager, A1000FixTool.
4. Connect a USB cable to the computer.
5. Press and hold the "Volume Up" key on the tablet.
6. Connect the micro USB to the tablet.
7. When you see !MT56xx preloader, choose it and update the Driver.
8. When the driver installation is finished, the A1000FixTool will find and fix the tablet quickly.
9. Disconnect the tablet from the computer and connect it to a charger.
10.Power on the tablet.