https://forums.autodesk.com/t5/installation-licensing-forum/autocad-2015-failed-installation/m-p/5767049#M146557 <P>That looks to have done it. Like a previous comment I saw, I cannot change the ownership back to TrustedInstaller, although it is listed on the page. So my user is still the owner. I suppose that makes no diference?</P><P>Thank you very much for your help. I will begin using the new Win 10 system with AutoCAD 2015 Architecture tomorrow and hopefully it will do all it should.</P> Tue, 11 Aug 2015 23:55:39 GMT Anonymous 2015-08-11T23:55:39Z