There is no official "portable" version of Microsoft Project. Versions labeled as "portable" or "free" on third-party sites are often unofficial, modified, and can pose significant security risks, including malware or legal issues.
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Would you like a detailed setup guide for ProjectLibre Portable (the best free, legal alternative that runs from a USB drive)? There is no official "portable" version of Microsoft
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Microsoft Project is part of the Microsoft 365 ecosystem. It is a premium product, typically costing anywhere from $10 to $30 per user per month, depending on the plan.
Getting Started with Microsoft Project: Downloads, Trials, and Portable Alternatives