Ahoy, All,I have Inventor 2011 (student) ~~three years.  Recently re-installed it on my (repaired) main computer  --  works OK.  Got a spare computer (Dell 64 bit), to play Inventor and display the tutorial.  Won't install.  Are there limits to installations???Thanks  /s/  Bob  

Typically you cannot install the same program on two different computers using the same authorization code.  You can however transfer the license between two computers but I don't know if this applies to the student version.