Sims 2 played for months but now crashes

Afloridagal

Hi everyone
I've been playing Sims 2 for about a few months on Vista Desktop and
all of a sudden it just decided to crap out on me. It now quits at the
title screen and doesn't respond after that.

I've been told to upgrade my graphics card and RAM. Was also told that
the graphics card was supposedly not upgradeable b/c it was attached to
the mother board? Here is my DxDiag ...

I tried to search for this for a few days before posting but its
starting to bug me. I can't afford another computer but I can slowly
upgrade this if its possible to be able to play ALL of my games again.

Thanks in advance.. Afloridagal

------------------
System Information
------------------
Time of this report: 6/24/2008, 19:32:42
Machine name: HOLLI-PC
Operating System: Windows Vista™ Home Premium (6.0, Build 6000)
(6000.vista_ldr.071023-1545)
Language: English (Regional Setting: English)
System Manufacturer: HP-Pavilion
System Model: GN568AA-ABA s3223w
BIOS: Phoenix - AwardBIOS v6.00PG
Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ (2
CPUs), ~2.3GHz
Memory: 894MB RAM
Page File: 907MB used, 1137MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 10
DX Setup Parameters: Not found
DxDiag Version: 6.00.6000.16386 32bit Unicode

------------
DxDiag Notes
------------
Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Sound Tab 2: No problems found.
Input Tab: No problems found.

--------------------
DirectX Debug Levels
--------------------
Direct3D: 0/4 (retail)
DirectDraw: 0/4 (retail)
DirectInput: 0/5 (retail)
DirectMusic: 0/5 (retail)
DirectPlay: 0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow: 0/6 (retail)

---------------
Display Devices
---------------
Card name: NVIDIA GeForce 6150SE nForce 430
Manufacturer: NVIDIA
Chip type: GeForce 6150SE nForce 430
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_03D0&SUBSYS_2A66103C&REV_A2
Display Memory: 313 MB
Dedicated Memory: 122 MB
Shared Memory: 191 MB
Current Mode: 1024 x 768 (32 bit) (60Hz)
Monitor: Generic PnP Monitor
Driver Name: nvd3dum.dll
Driver Version: 7.15.0011.6222 (English)
DDI Version: 9Ex
Driver Attributes: Final Retail
Driver Date/Size: 7/7/2007 00:15:00, 4788224 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B71E3E-4090-11CF-C26B-6D0A02C2CA35}
Vendor ID: 0x10DE
Device ID: 0x03D0
SubSys ID: 0x2A66103C
Revision ID: 0x00A2
Revision ID: 0x00A2


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Afloridagal