A. It's simple to change the logon screen for Windows 7, but depending on the picture, you might want a darker or lighter shadow around the content.

  1. Start the registry editor (regedit.exe).
  2. Move to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI.
  3. Create a new DWORD value named ButtonSet.
  4. Set the data to 0, 1 or 2. 0 is the darkest shadow (default) and 2 is the lightest. Click OK.

The change takes effect immediately.

Value of 0 (dark, the default):

 

Value of 2 (light):