The actual process requires creating some registry keys, folders and files.
Using a feature that was originally designed for OEM computer manufactures like Dell and others to brand their computers, everyone can now safely customize their Windows 7 logon screen background. For the first time in Windows with the Windows 7 release, Microsoft is providing the ability to customize the logon screen background without hacking any system files. When I first started to customize logon screens in Windows using a resource hacker to replace bitmaps in logon screen DLL files was the only way. This would get the job done but it would also break digital signatures on the system files, something that Microsoft values more and more with each OS release.
