اینم برای ویندوز 7
Step 1: Open the Windows Start menu and enter
regedit into the search bar.
Step 2: Right click on
HKEY_LOCAL_MACHINE and select
Find.
Step 3: Search for
OEMBackground, which should be in Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Win dows\CurrentVersion\Authentication\LogonUI\Backgro und. If the key does not exist, add a new DWORD value with the name
OEMBackground.
Step 4: Double click on the entry
OEMBackground, and change the value from 0 to 1.

Step 5: Open Windows Explorer and go to the following path:
%windir%\system32\oobe.
Step 6: Create a new folder named
info, and open it.
Step 7: Create a new folder within
info named
backgrounds.
Step 8: Rename your desired wallpaper as
backgroundDefault.jpg and place it inside the folder backgrounds (images must be less than 245KB in size).
