The most reliable source for a clean, official ISO is the Microsoft Evaluation Center .
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If your organization already owns licenses for Windows Server 2012, you should download the ISO from the Volume Licensing Service Center . This version does not have the 180-day restriction and can be activated with your existing Volume License Key (VLK). The most reliable source for a clean, official
These images allow you to use the software for 180 days before requiring a full license activation. windows server 2012 iso download