Here is a software for that! only click here

With this software, you can change the original logon screen that you see when you just turn on the PC (You know… the log in one) You can change that boring wallpaper to any of your choice, to make it more your own.

This option is just for Windows Se7en, you can modificate it with some commands that you can find in the regedit command prompt, but this is an easiest way to do it, hope you like it (It’s not made by me, it’s from Winmatrix site).