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Microsoft Outlook 2010 error..."Outlook.pst" is not an Outlook data file (.pst)

Hello Experts,
Came into work this morning and attempted to open my email (Outlook 2010).  Got an error message that 'Outlook.pst is not an Oulook data file'.  Following a suggestion, I deleted the profiles key in the registry.  Upon opening Outlook it made me create a new account.  I did so and it works fine, but all my prior email/contacts/calendar are in the other data file that won't open.  I tried adding it to my list of data files but am still getting the error message.  My new Outlook.pst file is under .../My Documents whereas my old file was under .../Local Settings/Application Data/Microsoft/Outlook.  How can I get my data back?

Thanks
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Lee Ingalls
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Run SCANPST.exe to repair the original .pst; it is installed with Outlook.
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Where do I run it from?
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Lee Ingalls
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Sorry, running XP Pro.  Doesn't work from "Run"
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Thank You.  The scanpst.exe utility repaired the file.