new games made my computer slow and the game slow

It may be helpful if you post your dxdiag here.

Hi, i'm having the same issue. Here's my info..

Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601)
Processor: AMG Athlon(tm) II P320 Dual-Core Processor (2CPUs), ~2.1GHz
Memory: 4096MB RAM
Name: ATI Mobility Radeon HD 4250
Date: 29/03/2010 7:45:34 AM

I'm hoping it isn't a performance issue for my computer x_x

Currently, I have Sims+Pets, Seasons Expansion and Nightlife Expansion installed.

------------------
System Information
------------------
Time of this report: 12/28/2012, 21:06:24
Machine name: GYGABYTE-5DF3B7
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.120821-1629)
Language: English (Regional Setting: English)
System Manufacturer: GBT___
System Model: AWRDACPI
BIOS: Award Modular BIOS v6.00PG
Processor: Intel(R) Pentium(R) D CPU 2.80GHz (2 CPUs)
Memory: 1016MB RAM
Page File: 1982MB used, 459MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
DxDiag Version: 5.03.2600.5512 32bit Unicode

------------
DxDiag Notes
------------
DirectX Files Tab: No problems found.
Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Sound Tab 2: No problems found.
Music Tab: No problems found.
Input Tab: No problems found.
Network Tab: No problems found.

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

---------------
Display Devices
---------------
Card name: Intel(R) 82945G Express Chipset Family
Manufacturer: Intel Corporation
Chip type: Intel(R) 82945G Express Chipset Family
DAC type: Internal
Device Key: Enum\PCI\VEN_8086&DEV_2772&SUBSYS_D0001458&REV_02
Display Memory: 128.0 MB
Current Mode: 1024 x 768 (32 bit) (60Hz)
Monitor: Dell M770
Monitor Max Res: 1280,1024
Driver Name: igxprd32.dll
Driver Version: 6.14.0010.4926 (English)
DDI Version: 9 (or higher)
Driver Attributes: Final Retail
Driver Date/Size: 2/15/2008 12:12:06, 57344 bytes
WHQL Logo'd: Yes
WHQL Date Stamp: n/a
VDD: n/a
Mini VDD: igxpmp32.sys
Mini VDD Date: 2/15/2008 12:12:06, 5854752 bytes
Device Identifier: {D7B78E66-6432-11CF-D664-0AF0A3C2CB35}
Vendor ID: 0x8086
Device ID: 0x2772
SubSys ID: 0xD0001458
Revision ID: 0x0002
Revision ID: 0x0002
Video Accel:
Deinterlace Caps: n/a
Registry: OK
DDraw Status: Enabled
D3D Status: Enabled
AGP Status: Not Available
DDraw Test Result: Not run
D3D7 Test Result: Not run
D3D8 Test Result: Not run
D3D9 Test Result: Not run

-------------
Sound Devices
-------------
Description: Logitech USB Headset
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID: USB\Vid_046d&Pid_0a0c&Rev_1013&MI_00
Manufacturer ID: 65535
Product ID: 65535
Type: WDM
Driver Name: usbaudio.sys
Driver Version: 5.01.2600.5512 (English)
Driver Attributes: Final Retail
WHQL Logo'd: Yes
Date and Size: 4/13/2008 23:15:14, 60032 bytes
Other Files:
Driver Provider: Microsoft
HW Accel Level: Full
Cap Flags: 0xF5F
Min/Max Sample Rate: 100, 200000
Static/Strm HW Mix Bufs: 0, 0
Static/Strm HW 3D Bufs: 0, 0
HW Memory: 0
Voice Management: No
EAX(tm) 2.0 Listen/Src: No, No
I3DL2(tm) Listen/Src: No, No
Sensaura(tm) ZoomFX(tm): No
Registry: OK
Sound Test Result: Not run

Description: Realtek HD Audio output
Default Sound Playback: No
Default Voice Playback: No
Hardware ID: HDAUDIO\FUNC_01&VEN_10EC&DEV_0883&SUBSYS_1458C603&REV_1000
Manufacturer ID: 1
Product ID: 100
Type: WDM
Driver Name: RtkHDAud.sys
Driver Version: 5.10.0000.5294 (English)
Driver Attributes: Final Retail
WHQL Logo'd: Yes
Date and Size: 9/6/2006 17:04:12, 4377600 bytes
Other Files:
Driver Provider: Realtek Semiconductor Corp.
HW Accel Level: Full
Cap Flags: 0xF5F
Min/Max Sample Rate: 8000, 192000
Static/Strm HW Mix Bufs: 33, 32
Static/Strm HW 3D Bufs: 33, 32
HW Memory: 0
Voice Management: No
EAX(tm) 2.0 Listen/Src: Yes, Yes
I3DL2(tm) Listen/Src: Yes, Yes
Sensaura(tm) ZoomFX(tm): No
Registry: OK
Sound Test Result: Not run

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thank you I think I know what to do to fix the problem and I updated the disc driver and it made it somewhat faster