How to: Upgrade from Visual Studio Trial Edition
Trial Editions can only be used for a limited amount of time, usually 90 to 180 days. After that time period has expired, you cannot use the product again without a valid product key.
To obtain a product key
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Purchase a copy of Visual Studio 2005 Professional Edition at a retail location. The product key is listed on the sleeve of the DVD or CD.
—or—
Order a Visual Studio 2005 Professional Edition product key online at http://msdn.microsoft.com/vstudio/howtobuy/. The product key is sent to you in an e-mail message.
To upgrade Visual Studio 2005 Trial Edition
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On the Start menu, click Control Panel.
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In Control Panel, open Add or Remove Programs.
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Select Microsoft Visual Studio 2005 Professional and then click Change/Remove.
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On the Visual Studio 2005 Maintenance screen, enter the product key in the section Upgrade to Visual Studio 2005 Professional and then click Upgrade.