Roberto
What version do you have? Try searching for a file called *.xlb (Ensure you
search for hidden files as this may be hidden), then delete it and Excel
will create a new one. it is the toolbar customisation file that often gets
corrupted.

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HTH
Nick Hodge
Microsoft MVP - Excel
Southampton, England
nick_hodgeTAKETHISOUT@zen.co.ukANDTHIS
web: www.excelusergroup.org
web: www.nickhodge.co.uk
> When I tried to create a new book, the excel application shuts down and
> closes itself. I did remove microsoft office ( home student version ) and
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> Thank you for your help.
> Roberto