TS3 Ambitions Crashing
Some people have reported crashing with Sims 3: Ambitions. It seems the expansion has an issue with the DEP (Data Execution Prevention) on your computer. Here's how to fix it. This will work for Windows XP, Vista and hopefully others. If you don't have crashing, then don't bother with this.
Feel free to copy this and repost it on Sims forums or on other sites. I don't deserve the credit for this information; I'm just passing along some info I saw on another site.
1. Go to Control Panel/System/Advanced/Performance Settings.
2. Go to the Data Execution Prevention tab. Click on "Turn on DEP for all programs and services except those I select" and press "Add." You will now add your Sims game, expansions and Stuff Packs to the DEP exception list. Copy-and-paste these "C:" locations in the spot where it says "File Name."
Sims 3 base game: C:\Program Files\Electronic Arts\The Sims 3\Game\Bin\TS3.exe
World Adventures: C:\Program Files\Electronic Arts\The Sims 3 World Adventures\Game\Bin\TS3EP01.exe