I make windows 7 Login Screens as sort of a hobby. To install these you will need Windows 7 Logon Background Changer or a compatible program.
For how, see: How to Change the Windows 7 Log On Screen Background
All images are 1920 x 1080 Pixels and are .jpg files. It is quite easy to instal by the use of the program mentioned. The first one is entitled Windows 7 Forum Login. I hope you enjoy them. Feel free to change them or do as you please. I consider them to be open source.
If anyone has a background that they would like made into a Login Screen please PM me with the image and I will post it in this thread. The image size that is displayed will NOT be in the image.
Just Download the .Rar file and extract.