How to Change Windows 10 Login Screen Background Image
Go to Settings in Windows 10, choose a photo under Lock screen, and turn on Show lock screen background picture on the sign-in screen.
Go to Settings in Windows 10, choose a photo under Lock screen, and turn on Show lock screen background picture on the sign-in screen.
To change the macOS Big Sur login screen, locate the lockscreen.png file in /Library/Caches/Desktop Pictures and replace with your own image.
To remove text formatting in macOS with the TextEdit app, open a new TextEdit document, choose Make Plain Text in the Format menu and paste.
To fix the "This app has been blocked for your protection" error in Windows 10, run the app in Command Prompt as administrator.