Message box origin

[Tom Liotta <qsrvbas@xxxxxxxxxxxx>]

I have a Win2K PC that has started to show a message box after being 
restarted. It's just a message box with "Message" as its title bar 
text and with "A network error has been found. The update document 
is not available." as its message text. It has [OK] and [Cancel] 
buttons, though [Cancel] seems to have no purpose.

I've done a number of searches to see if any files contain text like 
["network error has been found"], but no hits. Example searches were 
over the entire C:\WINNT and C:\Program Files and a few other 
directory paths.

So, the question: If a message box is being displayed on a Win2K 
desktop, is there a useful way to determine where it came from?

Fully patched Win2K, Zone Alarm, AVG, Ad-Aware, Open Office,... 
everything works as I expect. Lots of other stuff installed on D:\, 
E:\ and J:\ drives; but full-text searches can take some time. Just 
curious if anyone ever learned a neat trick about tracking...

Thanks for any suggestions.

Tom Liotta