Change Log On Screen Background in Windows 7

This post original from this it's because some times i dont remember the tutorial :) 

To Manually Change the Log On Screen in Windows 7


NOTE: This was discovered by Rafael Rivera at Within Windows. You should also visit his website for more detailed information on this.
1. Unhide file type extensions.

2. Click on the Download button to download the file below.
Use_Custom_Log_On_Screen.reg
3. Save the .reg file to the desktop.

4. Right click on the extracted .reg file and click on Merge.

5. Click on RunYes (UAC), Yes, and OK when prompted.

6. Save the custom .jpg image you want to use to the desktop with the name backgroundDefault.jpg.
WARNING: The custom image that you use must be a .jpg image less than 256 KB in size, or this will not work.

7. Check to see what your primary display screen resolution is. (See screenshot below)
NOTE: For example, mine is 1920 x 1280.


8. Open Paint, and click on the File icon (top left corner), Open, and navigate to and select the .jpg image from step 6.
NOTE: You can open Paint by typing mspaint.exe in the Start menu search line and pressing enter.

9. In Paint, click on Resize, dot Pixels, uncheck Maintain aspect ratio, then resize the .jpg image to the screen resolution size in step 7. 

10. In Paint, click on the File icon (top left corner), Save as, then save the new .jpg file to the desktop with the exact file name below with the screen resolution size of the image.
NOTE: For example, since by screen resolution is 1920 x 1280, I will resize the image to this size and save it with the name background1920×1200.jpg.

   Warning
The custom image that you use must be a .jpg image less than 256 KB in size, or this will not work. The backgroundDefault.jpg (step 6) image will be Streched to Fit and used by default if Windows 7 cannot find or use the correct screen resolution image file created in this step. These are the only sizes supported by the log on screen.
  • background768×1280.jpg
  • background960×1280.jpg
  • background900×1440.jpg
  • background1024×768.jpg
  • background1024×1280.jpg
  • background1280×768.jpg
  • background1280×960.jpg
  • background1280×1024.jpg
  • background1360×768.jpg
  • background1440×900.jpg
  • background1600×1200.jpg
  • background1920×1200.jpg

11. When done, close Paint.

12. In Windows Explorer, navigate to
C:\Windows\System32\oobe\info\backgrounds. (See screenshot below step 13)
NOTE: If you do not have any of these folders (ex: info and backgrounds usually), then create a new folder for the missing folder and rename it to the missing folder's name. If you are prompted by UAC when creating and renaming the folders, just click on Yes to approve.

13. Copy and Paste the .jpg files from step 10, and from step 6 into the C:\Windows\system32\oobe\info\backgrounds folder, then close the window. (See screenshot below)



14. You're logon screen is now changed. You can press Ctrl+Alt+Del to test it. Click on Cancel to return to the desktop.
NOTE: You can now delete the .reg and .zip files on the desktop if you like.

15. You can now hide the file extensions again if you like.

16. Depending on how light or dark your background image is, you may want to change the log on screen text shadow to make it look better as well.