Step 1

Have HiSuite installed on your PC. Then turn it off - make sure it does not run in background.

Step 2

Put your phone in fastboot and connect to PC. You should see warning message in the bottom right corner of the screen:

Device manager will indicate that device was not installed properly

Step 3

Disconnect phone from PC. Download fix file from this link >>here<<

Step 4

Series of Warning messages will appear, read them and accept.

Message 1

Message 2

Message 3

Step 5

Connect Huawei Mate 10 back to PC, you should see usb key icon in bottom right corner:

Device manager will show it now under "Android Phone" section, which indicates that phone was installed successfully: