Windows 7 will make it easier to change 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\CurrentVersion\Authentication\ LogonUI\Background
3. Then 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
6. Copy that image into the
C:\Windows\system32\oobe\info\backgrounds folder
7. Rename the image to backgroundDefault.jpg
8. Reboot the system , and now your logon Image would have changed.
Here is my Windows Log-On Screen


