Change Logon Background - Windows 7

Windows Registry Editor Version 5.00

1. Import reg
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Background]
"OEMBackground"=dword:00000001

2. Create folders info and backgrounds
%windir%\system32\oobe\info\backgrounds

3. Add image to backgrounds folder.

Name: backgroundDefault.jpg
Max Size: 256KB