Change Your Logon Screen Without Any Softwares

Windows 7 makes it easy changing the Windows log-on screen.
1.  Go to start, and click on Run, type Regedit & press enter there.
2.  Navigate to :
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Curren
rsion\Authentication\ LogonUI\Background 
3.  Double-click the OEMBackground DWORD key 
4.  Set value of the key to 1. 

5.  Select a background image for Logon Screen with size less than 256KB in size (Use of Image Resize software like VSO Resizer can help)
6.  Copy that image into the
C:\Windows\system32\oobe\info\backgrounds folder  
7.  Rename the image to backgroundDefault.jpg
8.  Reboot, and now your logon Image would have changed.

Here is my logon screen: