troubleshooting Question

Exchange 2007 to 2010 upgrade

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madkow70 asked on
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Please help.
I have one Exchange 2007 server running on Win 2008 SP2.
I was trying to upgrade the Exhange to 2010.

When I ran the setup from E2K10 DVD, and selected "install", I get following error.
"A previous version of Exchange Server is already installed on this machine."

I'm trying to install/upgrade the Exchange on the same box.  Obviously, I would not want to lose any data.

Thank you,

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