Windows 7 Tip - Change the login screen background

Navigate in the registry to
HKLM\Software\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Background

Then see if there is a DWORD value called OEMBackground and if so set the Hex value to 1.

If you do not have OEMBackground then you need to create a new DWORD value key called OEMBackground first.

After you are done navigate to

c:\windows\system32\oobe\

and create a info folder and then inside it create a background folder and put a JPEG file in there that is less than 256KB and call the file name

backgroundDefault.jpg

, then reboot and your done!