Having issues Installing TWRP Recovery On Huawei Mediapad T3 10 from Windows

adb and fastboot are different modes with different protocols, different interfaces, different drivers and different programs. therefore adb.exe is not working while phone is connected in fastboot mode, and vice versa.

Windows driver signature enforcement should be disabled so that one can install unsigned drivers.

  • Hold down shift while restarting Windows to enter advanced boot options
  • in menu select - Troubleshoot - Advanced options - Startup Settings
  • hit F7 for Disable driver signature enforcement

In Windows device manager select phone while connected in fastboot mode and install android_winusb.inf, select Android Bootloader Interface

Your phone now will be detected from fastboot.exe