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Hello kookhyeon,
I am Antonio, a Microsoft Community independent advisor, a Windows 10 and Microsoft office user like you. I hope I can help you on your concern.
Can you please try this solution below:
Type CMD in Task Bar Search, right click Command Prompt to Run As Administrator (or boot the Windows 10 Installation Media to access Repair My Computer on second screen, then Troubleshoot Options, open a Command Prompt) Copy and Paste the following commands each followed by Enter key:
sfc /scannow
If damaged files are reported run up to 3 separate times to try to repair files.
If irreparable files remain then the image file they are compared against may need repair. To determine this run:
DISM /Online /Cleanup-Image /CheckHealth
If Component Store corruption is detected, this will tell you if it is irreparable or can be repaired:
DISM /Online /Cleanup-Image /ScanHealth
If the image is reparable, run:
Dism /Online /Cleanup-Image /RestoreHealth
Once the image is repaired then the broken System files should repair by running again:
Sfc /scannow
You're response is highly appreciated. Please let me know if the issue is fixed, if not, we will find another way.
Please let me know if you need further assistance.
Keep safe always.
Sincerely,
Antonio