do they have the same name but ending with :1 and :2 (the window caption).

Then someone has done Window=New Window and saved the workbook. Just click
the close button on one of the windows and then save the workbook.

--
Regards,
Tom Ogilvy

"Mike Archer" wrote in message
...
Hello.
Does anyone have any idea on why a particular workbook
would cause a particular machine to open 2 instances of
excel (each on a different sheet). The only thing that
the Workbook_Open() routine does is show a userform. It
seems to occur even when macros are disabled.
TIA
Mike