Ok here goes I have found the answer on the internet - courtesy of Sydney Grey's Blog on
[You must be registered and logged in to see this link.] '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 (which I have) 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
High-End Loft Stuff:
C:\Program Files\Electronic Arts\The Sims 3 High-End Loft Stuff\Game\Bin\TS3SP01.exe
Ambitions:
C:\Program Files\Electronic Arts\The Sims 3 Ambitions\Game\Bin\TS3EP02.exe
Click OK. You'll have to restart the computer for this to take effect. It should stop the crashing.
Posted by Sydney at 10:20 PM'
I have Vista so should work on both Vista and XP.
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