In xl2003 menus:
File|SaveAs|Tools|General Options

Uncheck the "always create backup" checkbox.

Jeff wrote:

I work with one particular file that, when I save, always creates a back-up
copy with an xlk extension. No other file I work with does this. Why does
it happen, and how can I turn this off? I'm saving to a shared folder, and
don't want the extra copy out there.

--

Dave Peterson