I going to show you how to customize the Windows 7 login screen. There
are various methods to accomplish this, with and without third-party
software. I understand many people might not want to rely on a
third-party application, while others would appreciate a quicker,
safer route. First up is the more hands-on approach, and then the
utility. Hands-on approach This method will require you to modify the
registry, and if that puts a knot in your stomach, you should move on
to the next section. Step 1: Open the Windows Start menu and enter
regedit into the search bar. Step 2: Right click on HKEY_LOCAL_
MACHINE and select Find. Step 3: Search for OEMBackground, which
should be in ComputerHKEY_ LOCAL_ MACHINESOFTWAREMicrosoftWindowsC
urrentVersionAuthenticationLogonUIB ackground. If the key does not
exist, add a new DWORD value with the name OEMBackground. Step 4:
Double click on the entry OEMBackground, and change the value from 0
to 1. Step 5: Open Windows Explorer and go to the following path:
%windir% system32oobe. Step 6: Create a new folder named info, and
open it. Step 7: Create a new folder within info named backgrounds.
Step 8: Rename your desired wallpaper as backgroundDefault.jpg and
place it inside the folder backgrounds (images must be less than 245KB
in size). That should do the trick, now just lock your PC, log off or
reboot and enjoy. Third-party software If you are uncomfortable with
manually tinkering with the registry -- or simply have better things
to be doing with your time -- we understand. Various third-party
applications can change Windows 7's default logon wallpaper, but our
personal favorite is Tweak.com's Logon Changer. The software is
ridiculously easy to use, doesn't require installation, and it even
has built-in tools to automatically resize and recompress your images
while leaving the original file untouched. The Logon Changer also lets
you quickly change your logon wallpaper back to the Windows 7 default.
Start by downloading the app here, and then unzip the executable. Run
the program and it should present you with a preview of your logon
screen along with a few self-explanatory options: "Change Logon
Screen" lets you browse to a new image, "Test" will bring up your
logon screen, "Revert to Default Logon Screen" reapplies Windows 7's
original wallpaper.