Since 2003 has decided it wants to be the default, de-register 2003 and
re-register 2007

Close Excel first and On the Windows Taskbar

StartRun "C:\yourpathto2003\excel.exe" /unregserver

See the space between exe and /unregserver.

Then register 2007

StartRun "C:\yourpathto2007\excel.exe" /regserver

This process should make Excel 2007 the default for opening files.

You may not have to unregister 2003 first but I err on the side of
caution<g


Gord Dibben MS Excel MVP

On Tue, 1 Dec 2009 13:43:02 -0800, cathy downes <cathy
wrote:

I have both Office 03 and 07 installed - 07 was installed last and for the
last year it has been my default when double clicking on a file to open it.
For some reason this morning my system decided I no longer needed to use 07
and now everything opens in 03 when trying to open Excel files (all other
Office apps work fine and open in 07).

I saw a lot of Q&A on making 03 the default and tried to backward engineer
it so that 07 is the default but nothing is working.

Any thoughts on why it would stop working all of a sudden and what I can do
to fix it without having to completely reinstall or bite the bullet and
remove 03 all together?

thanks much