Looks like you still have that beta driver on it now. Did you check if there's a completely new one ?
I'm not sure if I switched from beta to (older) stable before running dxdiag. Anyway, removed the drivers completely, ran drivercleaner to remove any remaining traces, and installed the stable version again.
Did you try what happens if you turned all the options way down ?
According to this: http://simswiki.info/wiki.php?title=Game_Help:TS3_System_Requirements your graphic card isn't the greatest but might run if the options are set to lower. Usually crashes on startup are not down to computer issues though (although something it is something hardware related).
By default the game starts with the lowest possible settings, so yes, I've tried that. But I have a HD6870 GPU, that's quite a good GPU. It runs Battlefield 3 on very high.
Are you willing to try a third party tool ? There's a tool called crash log analyzer (just google).
Installed it. At first I saw some errors that I dont have the latest version of the expansions, so I downloaded the sims 3 patch downloader and forced it to install the latest updates for all my expansions. Didnt fix the problem though.
It's not a magic tool that can stop the crashes but it can give an indication to where the error lies. Just copy the errors you get to the clipboard and post them here.
Here it is:
Processor Name: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz
Processor Architecture: AMD64
Graphics Processor: AMD Radeon HD 6800 Series (1 GiB)
Antiviruses: Windows Defender
Games Installed: The Sims™ 3 (1.55.4.022017), The Sims™ 3 High-End Loft Stuff (3.13.1.011037), The Sims™ 3 Late Night (6.5.1.011037), The Sims™ 3 Outdoor Living Stuff (7.3.2.011037), The Sims™ 3 Master Suite Stuff (11.0.84.014017)
Custom Content: Yes (2 found)
[UNKNOWN] 25-8-2013 22:09:44
OS Version: 6.2.9200
TS3 Path: D:\Games\The Sims 3\Game\Bin\TS3W.exe
TS3 Version: 0.2.0.210
Installed RAM: 7,96 GiB
TS3 Free VM: 3,44 GiB / 4,00 GiB
Crash Type: ACCESS_VIOLATION reading address 0x00000008
Crash Address: 0x6f2ac17b "C:\WINDOWS\SYSTEM32\atiumdag.dll":0x0001:0x0000b17b
[UNKNOWN] 25-8-2013 22:38:06
OS Version: 6.1.7600
TS3 Path: D:\Games\The Sims 3\Game\Bin\TS3W.exe
TS3 Version: 0.2.0.210
Installed RAM: 7,96 GiB
TS3 Free VM: 2,83 GiB / 4,00 GiB
Crash Type: ACCESS_VIOLATION reading address 0x00000008
Crash Address: 0x6f2ac17b "C:\WINDOWS\SYSTEM32\atiumdag.dll":0x0001:0x0000b17b
[UNKNOWN] 25-8-2013 22:58:34
OS Version: 6.1.7600
TS3 Path: D:\Games\The Sims 3\Game\Bin\TS3W.exe
TS3 Version: 0.2.0.210
Installed RAM: 7,96 GiB
TS3 Free VM: 2,82 GiB / 4,00 GiB
Crash Type: ACCESS_VIOLATION reading address 0x00000008
Crash Address: 0x6f2ac17b "C:\WINDOWS\SYSTEM32\atiumdag.dll":0x0001:0x0000b17b
[UNKNOWN] 25-8-2013 23:20:44
OS Version: 6.1.7600
TS3 Path: D:\Games\The Sims 3\Game\Bin\TS3W.exe
TS3 Version: 0.2.0.210
Installed RAM: 7,96 GiB
TS3 Free VM: 2,85 GiB / 4,00 GiB
Crash Type: ACCESS_VIOLATION reading address 0x00000008
Crash Address: 0x6f2ac17b "C:\WINDOWS\SYSTEM32\atiumdag.dll":0x0001:0x0000b17b
[UNKNOWN] 27-8-2013 19:35:48
OS Version: 6.1.7600
TS3 Path: D:\Games\The Sims 3\Game\Bin\TS3W.exe
TS3 Version: 0.2.0.210
Installed RAM: 7,96 GiB
TS3 Free VM: 2,83 GiB / 4,00 GiB
Crash Type: ACCESS_VIOLATION reading address 0x00000008
Crash Address: 0x669dc17b "C:\WINDOWS\SYSTEM32\atiumdag.dll":0x0001:0x0000b17b
[UNKNOWN] 27-8-2013 19:52:13
OS Version: 6.1.7600
TS3 Path: D:\Games\The Sims 3\Game\Bin\TS3W.exe
TS3 Version: 0.2.0.210
Installed RAM: 7,96 GiB
TS3 Free VM: 2,86 GiB / 4,00 GiB
Crash Type: ACCESS_VIOLATION reading address 0x00000008
Crash Address: 0x669dc17b "C:\WINDOWS\SYSTEM32\atiumdag.dll":0x0001:0x0000b17b