As the person who is responsible for building deployment images, you may decide that you want to force the users to have a default user logon picture for the Welcome screen, both on their local desktop and on Remote Desktop Services. There is a Group Policy setting in Windows Server 2008R2 and Windows 7 that allows you to do this.
1. Click Start, type gpedit.msc and press ENTER
2. Go to the following branch:
Computer Configuration | Administrative Templates | Control Panel | User Accounts
3. Double-click Apply the default user logon picture to all users
4. Set it to Enabled
5. Exit the Group Policy Editor.
This policy setting allows an administrator to standardize the logon pictures for all users on a system to the default user picture. One application for this policy setting is to standardise the logon pictures to a company logo.
If this Policy is enabled, the Welcome Screen uses the default user picture which is stored at %PROGRAMDATA%\Microsoft\User Account Pictures\user.bmp.
The default guest picture is stored at %PROGRAMDATA%\Microsoft\User Account Pictures\guest.bmp. If the default picture does not exist, an empty frame is displayed.
To display your preferred image or the company logo, replace the file user.bmp (128×128 px) in the following folder:
%PROGRAMDATA%\Microsoft\User Account Pictures.
The picture won’t change until after the user has logged on and then off again for the first time, but rest assured that once they have done this, your new company standard profile picture will be in place. You will also find that the change your picture option in the User Accounts applet is removed.
This article was based on an original article at http://www.winhelponline.com