This small program will enable Windows 7 users to change the background image of the logon screen. You can select a folder with images from your hard drive, then select an image.
The program displays a preview of the logon screen with the new background. It is able to resize the image, if it is too large, in order to fit perfectly onto your screen.
You can revert anytime the background to the Windows' original one.
Tweaks.com Logon Changer is available as free download for Windows 32-bit and 64-bit.