I have windows 7 64 bit, 4 gb Ram meet all requirements. Tried re install, nothing. Turned off UAC and reinstalled, nothing. Tried Run as Admin and it still freezes. Its hasn't opened for me yet once.
Search (Google) for the Autodesk Clean Uninstall instructions for fresh start.
Install with anti-virus and UAC off.
I deleted autodesk from registry, sytem files, temp files, program files and uninstalled it as well and reinstalled it and still same problem
Start with some of our most frequented solutions or visit the Installation and Licensing Forum to get help installing your software.