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From your computer, navigate to the set-up folder, and then double-click the setup file.
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In Select Installation Type, select Administrator, and then click Next.
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In Oracle Home User Selection, select Use Windows Built-In Account and click Next.
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To continue, click Next.
To change the Oracle base or Software location, click Browse, select directory, and then click Next.
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In Summary, click Install.
Place the Tnsnames.ora file in the <OrcaleHome>/Network/Admin.