Inventor 2014 and all earlier versions of Inventor cannot be launched on Windows 8.1. The following message is displayed:
The application was unable to start correctly (0xc0000142). Click OK to close the application.
This issue is fixed in Inventor 2014 Service Pack 1. You can download or directly install this service pack at Autodesk Inventor 2014 Service Pack 1. The Inventor LT 2014 Service Pack 1 can be downloaded at Autodesk Inventor LT 2014 Service Pack 1.
Note: Versions prior to Inventor 2014 do not support Windows 8.1. Inventor 2015 does support Windows 8.1.
Windows Explorer may crash if any earlier versions of Inventor, Inventor LT, or InventorView are installed. Windows will display the "Windows Explorer has stopped working" dialog. To avoid this crash, you can uninstall unsupported versions from the Control Panel.
If Inventor 2014 is installed, you can install the service pack directly from the web browser. This eliminates the need to run 2014 SP1 from a Windows/Run prompt.
Additional Requirement to Re-register Inventor
Perform the steps in the following solution link to re-register Inventor after SP1 is successfully installed.
Unable to Save As or Import DWG/DXF
Products: Inventor;Inventor LT;Inventor Professional;Inventor Factory Advanced;Inventor Factory Premium;Inventor Series