Mpeg-4 Part 10 File Extension. Preserving OEM Pre-Activation when Re-installing Windows Server 2003 R2 • • 2 minutes to read In this article By Doug Thompson Large Server Manufacturers known as Original Equipment Manufacturers (OEMs) have the ability to pre-activate Microsoft® Windows Server 2003 R2 software installed on new Server. As a result, end users are typically not required to activate the software during the set up process by typing in the product key found on the Certificate of Authenticity attached to the Server (COA Key).

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