Microsoft still sells legitimate product keys for Office 2016 (Home & Business, Professional Plus through volume licensing). But you don't need the full installer. Use the official to install only the apps you need (e.g., just Word and Excel) and exclude Outlook, Publisher, Access, and language packs. This can bring the install size down to 800–900 MB .

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Instead, choose a safe alternative or purchase Office legitimately. Your privacy, security, and peace of mind are worth far more than the few minutes saved by downloading a fake “highly compressed” version.