Right, what sounds like is happening is while it's trying to load it crashes. Why it crashes is what we're trying to figure out.
For example, every now and again, my game crashes to desktop. From what we can tell it's because the game and my sound driver conflict with each other. All I can do is try launching the game again.
Doing some searching on the problem. - Sims 3 crashing while loading
If you're not able to get the game loaded to the main menu. What we can do is try to edit the options.ini file.
C:\Users\<username>\Documents\Electronic Arts\The Sims 3\options.ini
This link below will help walk you through editing the options.ini file
http://modthesims.info/wiki.php?title=Game_Help:Sims_3_Crashing_ChecklistI am also including a zipped file that has my options.ini file in it. In case you want to try it to see if it helps.
I have most things turned off, medium settings
Windowed mode with 1366x768 in-game screen resolution
General Settings:
UnCheck In-game Store / Lessons / Interactive Loading Screens
Disable Memories
Edge Scrolling Checked and 12 hour clock
==========
Online Settings:
No Online Notifications = All online options unchecked.
Weather turned off
Let me know if any of this helps? -- I'm thinking if it does help, you can then go into options and change it to your liking