A few things you could try that seemed to work for me, my game hasn't crashed in days:
1) Add Sims as a DEP exeption here is a tutorial on how to do that: http://www.trainingtech.net/configuring-data-execution-prevention-in-windows-8/
Make sure you add the files in all of these folders:
C:\Program Files (x86)\Electronic Arts\The Sims 3\Game\Bin
C:\Program Files (x86)\Electronic Arts\The Sims 3\Game\Bin\Packs
And in Game\Bin for every expansion pack. There won't be a "Packs" file in your expansion folders.
It might not allow you to add some files, (usually sims 3 launcher ones) this is normal.
2) If you use Norton, this might be interfering with your game. Before you play your game put Norton in silent mode. This can be done by right clicking on the icon in your tray (it might be on your toolbar) and you will see the option "turn on silent mode". Just turn it off then, when you are done playing.
