How remove slow loading background image on RDP Server login

1) Click Start / Run / type REGEDIT and click OK

2) Navigate EXACTLY to the Key Value 
 - HKEY_USERS
 - .DEFAULT
 - Control Panel
 - Desktop

3) Locate the String Value:  ?Wallpaper?. 

Note: If you?re using a Dell, that string value data is probably ?\windows\system32\DELLWALL.BMP?

Screenshot of the String Value above (click to enlarge)

4) Now, either:
  a) right-click and delete the Wallpaper string value completely, or 
  b) change the value to a different wallpaper

   WARNING – Be sure you DO NOT delete the ?Desktop? Registry Key on the left, only nuke the ?Wallpaper? String Value on the right

5) Close REGEDIT