Hi 강석규,
This is the English translation of the steps.
- Press the Windows key + r, regedit then press enter.
- Navigate to this location. Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Lock Screen
- Righ-click to an empty area, click new then select DWORD (32-bit) Value.
- Name the DWORD SlideshowLayout
- Double click the SlideshowLayout input the Value Data = 1 and Base = Decimal.
- Click Ok, then close the registry editor.
Best regards,
Van