Download WSUS 3.0 SP2 from here:

http://www.microsoft.com/downloads/en/details.aspx?FamilyId=a206ae20-2695-436c-9578-3403a7d46e40&displaylang=en

Launch the installation. Click “Next”.

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Select “Full server installation including Administration Console” and click “Next”.

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Click “I accept the terms of the License agreement” and click “Next”.

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Select the location to store the WSUS updates and click “Next”.

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Select “Use an existing database server on this computer” and click “Next”.

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The installation will connect to the database, once it does, click “Next” to continue.

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Select “Create a Windows Server Update Services 3.0 SP2 Web Site” and select “Next”.

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Select “Next”.

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Click on “Finish” to exit the installation.

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When the WSUS Configuration Wizard pops up after installation, simply select “Cancel”.

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