Change windows 7 logon Background

Step 1:

Click Start button, type "regedit" (without quotes), the program will appear at the top of the list; right click over it and select run as Admin ; accept any security prompt.

Step 2:

Locate the HKEY_LOCAL_MACHINE > SOFTWARE >Microsoft > Windows > CurrentVersion > Authentication > LogonUI > Background

Step 3:

Right click on the right sided pane, and create a new DWORD and name it OEMBackground.

 

Double click over it and change the Value from 0 (zero) to 1

Close regedit.

Step 4:

Open C:\Windows\System32\oobe  here is the screenshot

open oobe folder click on Background bitmap image.

All you need to do this now

1. Create a subfolder inside oobe subfolder; name it "info", inside it create another subfolder, name it "Backgrounds".

2. Images must be of 24-bit and not larger than 256kb in bitmap format.

3. Default Image must be named: "BackgroundDefault.jpg"

4. It must be of the same resolution that of your monitor, For me, its 1024x768

Reboot ,You are done!..