We’ve highlighted a few of our more popular products below to make it a little easier for you to find your correct Product Key. Entering an incorrect product key will cause activation errors and you will be unable to use your Autodesk software. It is important to ensure you are using the correct product key for your Autodesk product and version. Product keys are required for installation of Autodesk products and are used to differentiate products that are both sold independently and as part of a product suite.