Question

I want to change Windows 7's boot screen. Is there any way?

Edit: I'm not talking about the logon screen. I'm talking about the screen which you see before the Welcome screen:

Answer 1

Yes, Windows allows OEMs to change the login wallpaper and it is easily done with a registry hack and placement of the correct files. see Change Windows 7 Logon Screen

Summary:

Create registry key: [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Background] "OEMBackground"=dword:00000001

Place image files in C:\Windows\System32\oobe\Info\Backgrounds that are the correct size:

* backgroundDefault.jpg
* background768×1280.jpg 
* background900×1440.jpg 
* background960×1280.jpg 
* background1024×1280.jpg 
* background1280×1024.jpg
* background1024×768.jpg  
* background1280×960.jpg
* background1600×1200.jpg 
* background1440×900.jpg
* background1920×1200.jpg 
* background1280×768.jpg 
* background1360×768.jpg

Note: the files must be <= 256KB

Answer 2

The only tool I know so far that can do it is TuneUp Utilities 2010 (which btw, is also a nice tool to keep your Windows 7 stable and cleaned).

It's possible that other tools will start to emerge. However the official Microsoft position was stated long ago (bottom of the page). So any solution will only be presented in the shape of third-party tools and most likely Microsoft will never provide a direct way for you to do it.

Answer 3

If you're just looking to change the default wallpaper, give the Tweaks.com Logon Changer a try.