This document provides instructions for activating Windows 7 without purchasing a license key. It explains that running an unactivated copy of Windows results in the "This copy of Windows is not genuine" error message appearing frequently. It then provides step-by-step instructions for using the command prompt to run the commands "SLMGR -REARM" and "slmgr -ato" to remove the watermark and activate Windows without needing additional software or a product key.