Customize Welcome Screen for Windows 7

Question

Scenario
Windows 7 displays the Welcome screen which contains a list of available user accounts when the computer is a part of a workgroup or homegroup.
This article describes how to customize Welcome screen for Windows 7, and there are two display style for choice:
Logon screen
Last logon user and others
Summary
Method 1: Logon Screen
The Logon screen requires users to type a logon name rather than selecting an account from a list of available accounts.
Click Start, and type gpedit.msc in the Search to
launch Group Policy Editor;
Expand to the policy entry Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Optionss;
Double-Click the policy Interactive logon: Do not display last user name, click
Enabled, and then click OK;
Click Start, and type cmd in the Search box. Right-click
cmd.exe in the Programs list, and then click
Run as administrator. Type gpupdate /force and press
Enter to refresh the Group Policy.
After logging off or switching user, the customized welcome screen will be as shown below.
Method 2: Last logon user and others
Click Start, and type gpedit.msc in the Search to
launch Group Policy Editor;
Expand to the policy entry Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options. Check the security setting
Interactive logon: Do not display last user name to be disabled.
Click Start, and type regedit in the Search to
launch Registry Editor;
Locate to keyHKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList;
Right-click on ProfileList, then click New>Key, name it
.default.
Restart you PC or refresh Registry Editor by pressing F5.
 After logging off or switching user, the customized welcome screen will be as shown below:
Applies to 
Windows 7 Professional
Windows 7 Enterprise
Windows 7 Ultimate
Windows 7 SP1 Professional
Windows 7 SP1 Enterprise
Windows 7 SP1 Ultimate
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Answer 1

Another customization:
To give your logon screen corporate design or individual style you can follow these steps:
In registry editor navigate to the key "HKLM\Software\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Background".
Create a new DWORD value OEMBackground and assign value 1. (Value 0 resets to the original logon screen.)
In C:\Windows\system32\oobe\info create the folder backgrounds, if it does not exist.
Put your custom picture into this folder under the name backgroundDefault.jpg.
Attention: maximum supported file size is 256 KByte, so shrink them with a tool like Irfanview or Image Resizer Powertoy Clone.
If you want to use different pictures for different screen resolutions, you can do so by naming them backgroundXXXXxYYYY.jpg, i.e. background1920x1200.jpg for the resolution 1920 x 1200. If the resolution does not match any of the given file names, Windows
will fall back to backgroundDefault.jpg.
Best greetings from Germany
Olaf