The online Wiki Help is the default help in Autodesk Inventor. If you are connected to the internet when you access Help in Autodesk Inventor, the Wiki Help displays. The Wiki provides robust, relevant, and up to date information. In addition, the Wiki enables you to partner with Autodesk to share your knowledge with others.
When you are not online, you can still have access to the Inventor Help locally. Access the internet, and then download from: http://www.autodesk.com/inventor-2013-help-download. When you are offline and you access the help, the local help displays.
Download the tutorial data files referenced in the Inventor 2013 Tutorials, and the instructions to install them from: http://www.autodesk.com/inventor-2013-help-download.