desktop background disappears

[r. wales]

I am running XPsp2, fully patched. Occasionally (maybe once or twice a
month), when I come back from lunch and hit the ctrl-alt-del to turn off the
screen saver and bring up the unlock window, I notice that the background is
missing. Instead of the picture I usually have there it is the standard
blue. After I unlock the workstation all of my icons and shortcuts are
there, but the background remains the same blue. I use BGInfo to display
certain information on the desktop and all of that is gone. I can't seem to
see anything unusual in the eventlogs, nothing different from the day before
when this didn't happen. Any ideas?

Thanks in advance.

 

[3c273]

I use UltraVNC to administer my workstations and it automatically disables
the wallpaper on the remote machine to conserve bandwidth. Perhaps someone
is doing maintenance during lunch.
Louis

 

[r. wales]

No VNC or other remote in the house. Remote assistance and remote access are
both unchecked, no lunchtime maintenance being done remotely. Anything else
that may be turning off the wallpaper?