Any 3rd party things installed that index, scan, sync, .etc Outlook data?

"TK" wrote in message
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I installed Outlook 2007 on Win7 per my CEO, brave huh...?
When she opens an email, the email duplicates itself in the Inbox.
When she re-sorts(like received time), the dup goes away.
She does have 1.2 GB OST file. Do you think this is causing the problem
or something else...?
Thanks, Tom...