https://forums.autodesk.com/t5/installation-licensing-forum/re-install/m-p/5460432#M150767 <P>Hello everyone. My computer crashed and I had all of my hard drive contents transfered to a new computer. So I need to get an activation code for the re-install for my C3D 2013. I went to this web site. (registeronce.autodek.com) entered my serial number just as it is on the confromation sheet, that I got</P><P>last year when I purchased C3D. Comes back Invalid number</P><P>&nbsp;</P><P>thanks</P> Tue, 06 Jan 2015 20:43:54 GMT Anonymous 2015-01-06T20:43:54Z https://forums.autodesk.com/t5/installation-licensing-forum/re-install/m-p/5460432#M150767 <P>Hello everyone. My computer crashed and I had all of my hard drive contents transfered to a new computer. So I need to get an activation code for the re-install for my C3D 2013. I went to this web site. (registeronce.autodek.com) entered my serial number just as it is on the confromation sheet, that I got</P><P>last year when I purchased C3D. Comes back Invalid number</P><P>&nbsp;</P><P>thanks</P> Tue, 06 Jan 2015 20:43:54 GMT https://forums.autodesk.com/t5/installation-licensing-forum/re-install/m-p/5460432#M150767 Anonymous 2015-01-06T20:43:54Z https://forums.autodesk.com/t5/installation-licensing-forum/re-install/m-p/5460464#M150768 <P>your serial number was probably upgraded to something else<BR />or could be this: <A href="http://knowledge.autodesk.com/support/autocad/troubleshooting/caas/sfdcarticles/sfdcarticles/Error-Serial-number-invalid-Subscription-product.html" target="_blank">http://knowledge.autodesk.com/support/autocad/troubleshooting/caas/sfdcarticles/sfdcarticles/Error-Serial-number-invalid-Subscription-product.html</A></P> <P>&nbsp;</P> <P>You can use the online method to activate your license here:<BR /><BR /><A href="http://knowledge.autodesk.com/contactus" target="_blank">http://knowledge.autodesk.com/contactus</A> or <A href="http://download.autodesk.com/us/support/RegistrationAndActivationWebForm.html?language=en" target="_blank">http://download.autodesk.com/us/support/RegistrationAndActivationWebForm.html?language=en</A> <BR />for the contact us page use these steps to fill out a form<BR />1. Activation &amp; Registration<BR /> <BR />2. Activating a Product<BR /> <BR />3. Activation Codes &amp; Request Codes<BR /> <BR />4. I still need help<BR /> <BR />5. Ask for assistance at the bottom<BR /><BR /><BR /></P> Tue, 06 Jan 2015 21:16:42 GMT https://forums.autodesk.com/t5/installation-licensing-forum/re-install/m-p/5460464#M150768 DarrenP 2015-01-06T21:16:42Z