The Logon Changer for Windows 7 provides an easy way to customize the logon screen background with just a few clicks. Simply download the freeware application, run it and click Change Logon Screen.
Clicking on the Change Logon screen button will prompt you for the location of the new background image you want as the Windows 7 logon screen, and then install the new screen behind the scenes. Logon Changer also provides users with a preview of how the logon screen will look with the new background image you choose.
Once you have selected and finalized the background for your logon screen, click on the test button to see the changes in action.
You can revert back to the default logon background by clicking on the revert to default logon screen button.