Computer Freezing?

Download memtest is one option,
or remove all but one stick of ram, see if you boot ok stick by stick, it should point out if ones bad or not
Moto

I believe the classical test would be Memtest86, chime in anyone if you have a better suggestion   Anyway, I would like to hear more about your other components e.g. PSU?

l'll post my dxdiag and someone on my forum told me that my processor doesn't work well with windows 7 is that true? I have a pentium D 2.8ghz. I also got windows 7 about a month after 2 additional gigs of ram and was wondering if anything in my dxdiag could not be working well with windows 7 32 bit.

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System Information
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Time of this report: 8/15/2010, 14:45:44
Machine name: NEKO-PC
Operating System: Windows 7 Home Premium 32-bit (6.1, Build 7600) (7600.win7_gdr.100226-1909)
Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
System Model: Dell DXP051
BIOS: Phoenix ROM BIOS PLUS Version 1.10 A07
Processor: Intel(R) Pentium(R) D CPU 2.80GHz (2 CPUs), ~2.8GHz
Memory: 3072MB RAM
Available OS Memory: 3070MB RAM
Page File: 2210MB used, 3928MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7600.16385 32bit Unicode
DxDiag Previously: Crashed in system information (stage 3) & Direct3D (stage 3) & DirectSound (stage 3) & DirectInput (stage 1) & DirectShow (stage 1). Re-running DxDiag with "dontskip" command line parameter or choosing not to bypass information gathering when prompted might result in DxDiag successfully obtaining this information

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

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DirectX Debug Levels
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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)

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Display Devices
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Card name: NVIDIA GeForce 9400 GT
Manufacturer: NVIDIA
Chip type: GeForce 9400 GT
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_0641&SUBSYS_0562196E&REV_A1
Display Memory: 2286 MB
Dedicated Memory: 1007 MB
Shared Memory: 1279 MB
Current Mode: 1280 x 1024 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: DELL E196FP
Monitor Id: DELA015
Native Mode: 1280 x 1024(p) (60.020Hz)
Output Type: HD15
Driver Name: nvd3dum.dll,nvwgf2um.dll,nvwgf2um.dll
Driver File Version: 8.17.0012.5896 (English)
Driver Version: 8.17.12.5896
DDI Version:
Driver Model: WDDM 1.1
Driver Attributes: Final Retail
Driver Date/Size: 7/9/2010 18:37:00, 9818728 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B71E3E-4501-11CF-D66D-6E251FC2C535}
Vendor ID: 0x10DE
Device ID: 0x0641
SubSys ID: 0x0562196E
Revision ID: 0x00A1
Driver Strong Name: oem12.inf:NVIDIA_SetA_Devices.NTx86.6.1:Section003:8.17.12.5896 ci\ven_10de&dev_0641
Rank Of Driver: 00E62001
Video Accel:
Deinterlace Caps: n/a
D3D9 Overlay: Supported
DXVA-HD: Supported
DDraw Status: Enabled
D3D Status: Not Available
AGP Status: Enabled

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Sound Devices
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Description: Speakers (High Definition Audio Device)
Default Sound Playback: No
Default Voice Playback: No
Hardware ID: HDAUDIO\FUNC_01&VEN_8384&DEV_7680&SUBSYS_102801A7&REV_1032
Manufacturer ID: 1
Product ID: 65535
Type: WDM
Driver Name: HdAudio.sys
Driver Version: 6.01.7600.16385 (English)
Driver Attributes: Final Retail
WHQL Logo'd: n/a
Date and Size: 7/13/2009 19:51:47, 304128 bytes
Other Files:
Driver Provider: Microsoft
HW Accel Level: Basic
Cap Flags: 0x0
Min/Max Sample Rate: 0, 0
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

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Sound Capture Devices
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DirectInput Devices
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Poll w/ Interrupt: No

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USB Devices
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Gameport Devices
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PS/2 Devices
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EVR Power Information
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Current Setting: {5C67A112-A4C9-483F-B4A7-1D473BECAFDC} (Quality)
Quality Flags: 2576
Enabled:
Force throttling
Allow half deinterlace
Allow scaling
Decode Power Usage: 100
Balanced Flags: 1424
Enabled:
Force throttling
Allow batching
Force half deinterlace
Force scaling
Decode Power Usage: 50
PowerFlags: 1424
Enabled:
Force throttling
Allow batching
Force half deinterlace
Force scaling
Decode Power Usage: 0

My Computer has been using a lot of cpu usage and about 30%physical memory lately too I have no idea why..