What is the difference between Volume Activation 1.0 and Volume Activation 2.0?
Volume Activation 1.0 uses a Volume License Key (VLK) that is issued to you under a specific license agreement. This key effectively “bypasses” activation. Most Volume Licensing customers are familiar with VLKs.Volume Activation (VA) 2.0—applicable only to the Windows Vista and Windows Server 2008 operating systems—requires product activation. VA 2.0 uses two different methods, each with its own key type: Key Management Service (KMS) and Multiple Activation Key (MAK).