Bitmap displayed during boot

My employer has just replaced my old PC with a newer one. During the
boot process, after the VGA screen with the progress bar, a bitmap
C:\WINDOWS\blueback.bmp is displayed. It is the Corporate Logo. I prefer
the standard XP boot behaviour.

I've tracked this down to the registry entry:

[HKEY_USERS\.DEFAULT\Control Panel\Desktop]
"Wallpaper"="c:\\windows\\blueback.bmp"

What I tried first was to rename blueback.bmp to blueback.old.bmp as
that would be easy to undo if it caused a problem.

Of course the logo no longer appears, but instead I get a blank, black
screen for several seconds. I think a standard XP system would display a
monochrome "Microsoft Blue" screen at this point, until the Welcome
Screen replaced it.

I managed to get at the registry on my old XP system, and in that one,
I'd deleted the "Wallpaper" entry altogether.

Would someone with a vanilla XP take a look to see if the Wallpaper
entry is there, and if it is, what does it point at? If it points at
blueback.bmp then I have a replacement one; I'd welcome a copy of the
original version.

I've just deleted the entry on my new PC, but I'm in the middle of a
long-running backup, so I won't find if I've done the right thing for a
day or possibly two.

--
Steve Swift
http://www.swiftys.org.uk/swifty.html
http://www.ringers.org.uk