I see lots of articles related to changing the various LOCK screen settings, but I am interested in changing the image displayed during user logon and logoff. In Windows 7 this was accomplished with a simple registry edit and some minor changes to the \oobe directory.

Any information would be great!

Google is your friend

https://social.technet.microsoft.com/Forums/windows/en-US/82e7ae0f-1b6e-4d04-ae05-8278911af3e2/changing-the-prelogin-screen-background-picture

Hi,

I have to say that there is no background "picture" on the log-in screen. That screen only shows a 'color'.

You can change the color of that screen, but this only changes the color if you are viewing All User Accounts. It does not change the color of the log-in screen if you are just viewing the last user account.

Here is a tutorial to make this change.

Sign in Screen - Change Background Color in Windows 8:
http://www.eightforums.com/tutorials/15554-sign-screen-change-background-color-windows-8-a.html