I am trying to install Inventor 2009. I already have inventor 2012, & 2010 on my machine. I ran all the discs everything looked good, but when I double clicked the 2009 icon on my desktop, I get a pop up that says "verifing license" then a message saying "inventor has encountered a problem and needs to shut down". On a side note I entered my 2010 serial # accidently during the original install, but I have the correct serial # and product key, but it will never let me get to the point where I can update the info.
iae_designer,
I recommend tht you post this in the Installation & Licensing Forum:
http://forums.autodesk.com/t5/Installation-Licensing/bd-p/24
The people most knowledgeable in this type of issue hang out there and will probably never see your post here.
I hope this helps,