How to change Windows 7 Logon theme

To change Windows 7 logon screen, it can be done with 2 ways: download tweak programs, and do it manually.

To use tweak program in order to change the screen, you can download Tweaks.com Logon Changer for Windows 7.

For another method, you can change it by yourself in the registry by follow the instructions on http://www.techspot.com/guides/224-change-logon-screen-windows7/ if you don't want to install add-on similar programs.