Hello SeunghyunShin,
Thank you for contacting the Microsoft community. We apologize for the inconvenience. We'll do our best to help.
If you set the device to tablet mode for verification, the touchscreen keyboard will automatically shut down and not run. Is that correct?
Were the system settings changed before this issue occurred?
In the meantime, try the following methods first and see if they help:
Run the Surface Diagnostic Toolkit
• Type Surface Diagnostic Toolkit in the search box on the taskbar, and then select it from the list of results, if it is not already installed, you can download it from the Surface Diagnostic Toolkit - Microsoft Store application.
• Follow the on-screen instructions in the Surface Diagnostic Toolkit.
Update Windows. Verify that all pending updates are installed.
• Select Check for Windows updates. Or, > Startup > Settings, select Windows Update.
Let me know how it goes so that we can provide more methods in case this doesn't work.
Best regards,
StevenK
면책 조항: 귀하의 언어에 대한 옵션이 없기 때문에 게시물이 영어로 이동되었습니다. 저희는 귀하의 언어로 교육을 받지 않았지만 저희가 아는 한도 내에서 문제를 해결하기 위해 노력할 것이므로 안심하십시오.