In Outlook, 'File|Open|Outlook Data File', navigate to the archive.pst file
and open it, find what you want and delete it.
Hal

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Hal Hostetler, CPBE -- hhh@kvoa.com
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> I've located the file where its saved:
> C:\Documents and Settings\susana\Local Settings\Application
> Data\Microsoft\Outlook\archive.pst
>
> but when I click on the archive folder I get a message that I'm attempting
> to open a file of type 'Office Data File' (.pst)