1- Disable UAC for windows 8.1 (allways run as Admin) thanks to eightforums.com
*Save the .reg file to your desktop.
*Double click/tap on the downloaded .reg file to merge it.
*If prompted, click/tap on Run, Yes (UAC), Yes, and OK.
*When finished, you can delete the downloaded .reg file if you like.
2- Change your region to China simplified
3- Disable "fast boot"
4- Reboot your computer (if u had all OK, no need reboot)