If you are a student or a professional, you might want to look into the Autodesk Education Plan Free Trial
When a user entered a valid serial number (e.g., 666-69696969) during installation, Revit 2009 generated a unique request code (e.g., kp51 yg2u kq7qrarl ) based on the machine’s hardware ID. This code had to be submitted to Autodesk’s activation server (or via an offline manual process) to obtain a corresponding authorization code . The request code algorithm used a 16-byte encrypted hash combining volume serial number, network adapter MAC address, and product ID. Without a valid authorization code from Autodesk, the software remained in trial mode or refused to run. This system was designed to prevent unlicensed use — no “best” feature or workaround existed outside the official activation flow. If you are a student or a professional,
: There's a balance between making the activation process secure and ensuring it's convenient for legitimate users. Complex or cumbersome activation processes can deter potential customers. Without a valid authorization code from Autodesk, the
If you are attempting to use this data to activate software, be aware of the following risks: 666-69696969) during installation
: Input your valid serial number and product key when prompted.