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How to Change the Windows 7 Logon Background
The default login screen in Windows 7 looks just as good as any other screen, but if for some reason you don’t like it, you can change it. Unlike Windows 10, the procedure for changing the Windows 7 login screen background is a bit different and requires a few extra steps to get the job done.
There are several ways to change the background image of the login screen. You can use any of the ways to set your favorite image as the background of your login page.
Before you can assign a new image as the background image for the Windows 7 logon screen, you must change a value using the Registry Editor or the Local Group Policy Editor.