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.
- Start the registry editor (regedit.exe).
- Move to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI.
- Create a new DWORD value named ButtonSet.
- 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):