Hi bb-
I don't understand what you mean by <<in Microsoft 2003 products>>, but in
Word (and only Word) it sounds like you have Track Changes enabled.
Go to View>Markup, then go to Tools>Track Changes to make sure the feature
is turned Off.
If that doesn't solve the problem, please post back with more specific info
re what seems to be triggering the 'line' and in which programs.
HTH |:>)