https://forums.autodesk.com/t5/inventor-forum/error-starting-inventor-2015/m-p/5847522#M358220 <P>Looks like you are Windows 10, first make sure you have all the SP's and Updates installed for your product.</P> <P>&nbsp;</P> <P>Try this:</P> <P>&nbsp;</P> <P>&nbsp;</P> <P>See <A href="http://knowledge.autodesk.com/support/inventor-products/downloads/caas/downloads/content/hotfix-inventor-2012-unexpectedly-exits-after-updating-to-windows-81.html" target="_blank" rel="nofollow">http://knowledge.autodesk.com/support/inventor-pro​ducts/downloads/caas/downloads/content/hotfix-inve​...</A></P> <P>&nbsp;</P> <P>Ensure to follow the manual re-registration instructions at the end of <A href="http://knowledge.autodesk.com/support/inventor-products/troubleshooting/caas/sfdcarticles/sfdcarticles/Unable-to-Import-DWG-DXF.html" target="_blank" rel="nofollow">http://knowledge.autodesk.com/support/inventor-pro​ducts/troubleshooting/caas/sfdcarticles/sfdcarticl​...</A></P> Tue, 06 Oct 2015 16:44:11 GMT blair 2015-10-06T16:44:11Z