Autodesk Desktop Companion version 5 is an optional component of AutoCAD and Inventor 2015 product installation.

Autodesk 360 Drive functionality is supported only within 2015 products by Autodesk Desktop Companion (sync) version 5 or above.

Select the Run option to continue the installation successfully. If you choose to download and install from local files, to a system not within the same Domain, you may encounter a Security Warning dialog during the Application Manager installation.If you download the source files to a local folder with a name that contains non-English characters, ensure that the language in Regional Settings is consistent with the language name of the local folder.Close all Autodesk applications before installation, maintenance, or uninstallation of the software.For more information, and access to this fix and related Microsoft downloads, see Autodesk Technical This fix ensures that Autodesk receives the correct data from Inventor error reports. If you are using Windows 7 on a 64-bit system, please verify that you have the Microsoft fix for user mode callback exceptions KB976038.Reboot your system after all security updates, and so on, are installed. Please update your operating system before you install Autodesk Inventor 2015.Notes About Installation and Uninstallation

Autodesk inventor 2015 download link