Windows 7 allow end-user to install the operating system without entering a product key during installation.īy not keying in a product key, users get to enjoy 30 days of free usage (rearm to extend to 120 days) without activating the operating system, as initial grace or OOB grace period.Īlthough end-user does not enter any product key into the system, Windows 7 uses a default product key to install the operating system.
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