Microsoft Activation Scripts (MAS GRAVE) O Microsoft Activation Scripts Activator (MASS GRAVE) is a tool that allows bypassing Microsoft’s standard activation process. It is usually used to activate the Windows operating system or Microsoft Office packages without acquiring an original Microsoft license. This tool works by manipulating product keys or tricking the system into believing that the software has an official license. This software does not require downloading or installing any activator. The entire activation process is carried out in PowerShell and CMD. Features (mass grave dev) How to start MAS and activate Windows and Office? Step 1: First, close your Antivirus or Windows Defender. Step 3: Click here and copy the code. irm | iex Step 4: Insert it and press Enter. Step 9: Wait for the activation to complete. Congratulations! Video Instructions Peculiarities of the MAS Grave Activation Script Here are the main features of the MAS activator: Offline activation Permanent activation.