Runtime error

[kaylh]

I recently installed Inventor Fusion 2013, but it doesn't open and shows following error message

"Runtime Error! Please repair or reinstall the program.
We’re sorry, there was an error while initializing the graphics subsystem. This is likely due to one or more of the following: your graphics driver is not configured for "True Color", there was a problem installing the application, the application installation was damaged, or some other problem with the graphics hardware and drivers or the configuration of the application. More detailed information may be included below."

I am currently running Windows 7 service pach 1(64bit) and I have GT 640 vga with latest drivers. I tried installing severaltimes but it gives the same error.