Office C2R Install — Click-to-Run Installer

Tool to install, update or uninstall any version of Microsoft Office Click-to-Run (Microsoft 365, Office 2021, 2019, 2016) with full control over components, update channel and language.

Activate Office with MAS (Microsoft Activation Scripts)

Once Office is installed, you can activate it with MAS from massgrave.dev — the most widely used open-source activation project. For Office, use the Ohook method, which activates Microsoft Office permanently with no server connection required. The same script also activates Windows (HWID / KMS38).

Open PowerShell as administrator and run the official one-liner; an interactive menu appears where you pick Ohook Activation for Office: