Apply log-on screen wallpaper without using any software.

Below there are some steps you can follow to apply wallpaper of your own choice:

#1. Press win + R to open Run command.

#2. Type regedit in run command.

#3. Now go to the following:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Background

#4. Now in right-side pane, change value of  ''OEMBackground to 1''.

#5. Now go to following folder:

windows\system32\oobe\info\backgrounds

#6. Copy the desired wallpaper in this folder and rename the wallpaper to 'backgroundDefault' without any quotes.

NOTE:-Wallpaper should be not more than 256 KB and should be .jpg format.