http://usa.autodesk.com/3ds-max/how-to-buy/
Then you go to free software for students.
http://students.autodesk.com/?nd=download_center
You're at the download center, now you need to find Autodesk 3Ds max which you want.
Click on it, and Download now.
It will show up
Autodesk Account shit.
Just make one.
And download.