Change windows 7 logon screen

 

Registry Trick

To change the logon screen manually follow these steps

1.Fire up registry editor (Win Key + R and then type regedit, hit enter)

2. browse in the sequence

HKEY_LOCAL_MACHINE-->software-->Microsoft-->Windows-->currentversion-->Authentication-->LogonUI-->Background

3.double click on key named OEMBackground and change its value to 1..if you dont find any key of such name..then right click on the menu and select new-->dword value32 bit key-->rename it to OEMBackground and set the value to 1

4.You just enabled the OEM Background functionality. Now browse to the folder

C:-->windows-->system32-->oobe-->info-->backgrounds

if u dont find any folder already dere then make a folder of respective name

5.Now put in any JPG file with size less than 256 kb in this folder and rename it to backgroundDefault.jpg. This file will be stretched to fit the screen, so you would want it to match the resolution of your screen so that image doesn’t look bad. You can something like smush.it or Photoshop’s Save as/Save for Web feature to reduce image size.

Using Tools

Check out HERE, that lets you choose a image file to use as your logon background. That all what you do, just choose an image and Logon Changer will take care of everything else including the file size limit. It also makes it super easy to revert back to the default Logon Screen.