Thanx for Comments

"...I tried to load 123D (to see what the hype was about) and the thing wouldn't start up.
Gave me an error during the splash screen that related to the fact that my video card wasn't good enough for Autodesk products.
- More like Autodesk is in bed with vid card manufactures!"


you can also try inventor Fusion preview, it has the 123d filled engine.
maybe this wouldn't crash.

http://labs.autodesk.com/technologies/fusion/