Input is Chinese, but come out? Cause and treatment

On some WINDOWS 8.1 or Windows 10 systems, a question mark is displayed when you enter Chinese characters in the edit box on the software interface. That is, Chinese characters cannot be entered, but only English letters can be entered. This is a very annoying problem, and many people have reinstalled the system many times and the problem still persists.
After a variety of tests, it is found that the cause of this problem is mainly unicode encoding conversion problems, generally such problems on the computer installed on the American Query keyboard, in the language setting option to delete the American keyboard, and then run the software, found that you can normally input Chinese characters.
Take WIN10 as an example, the specific operation process is: the bottom left "start" icon - Settings - time and language - region and language - the right language item to find the windows display language, click on the "options" button - in the new window to look down the keyboard list, see if there is an American keyboard, select - delete.

After the above process is completed, close the window, open the software in question, enter Chinese characters, it should be normal.