Windows 7: Little Help?

Hello everyone, i must be sounding like a moron my this point but o well. I am generally very good with computers till it comes to hardware then idk anything really. Well i got an error with the hardware in my computer and i was wondering if someone could help me out with it. My computer randomly shuts itself of without warning and no logical reason i can think of. It 90% of the time happens when i am not using the computer. Sometimes when i turn on the computer after it has shut itself off it will turn itself off immediately after about 2-10 minutes. Very percilular.

Computer Specs
Operating system: MS windows 7 ultimate 64-bit
CPU: AMD Athlon 64 x2 3800+ Toledo 90nm architecture
RAM: 2.0GB OCZ Dual-CHannel Ddr @ 215MHz (3-4-4-8)
Motherboard: NF-CK804 (Socket 939) NIVIDIA nForce4 Chipset
Hard Drive: 1000GB Wester Digital WCD WD1001Fals-00J7B0 ATA Device
Optical Drives: HL-DT-ST DVDRAM GH22LS40 ATA Device
Audio: Realek AC'97 Audio
Fans: V1 CPU Cooler (CL-P0401)

Overheating should not be a problem. The hottest thing in my computer is the hard atm is my hard drive at 44 degrees Celsius.

Tell us as much as you can about your power supply.

What does the bios say about its output?

I thought that to but i got a new one, about 1 month old and it puts out around 650w. Its the "CORSAIR CMPSU-650TX 650W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply - Retail"

Here is the link:
Newegg.com - CORSAIR CMPSU-650TX 650W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply - Power Supplies

I don't think its the power supply as the problem started before i got the new one. I got the new power supply because of these issues.

What version of Win 7 are you running RTM or RC? How long has it been installed?

I had the Europe 7600 version for a while, now i have the official US release. Has this issue on both of them.

Was looking around in event viewer and i keep getting this error right before crash.

Event Before Crash
Audit events have been dropped by the transport. 0

Critical Error
The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.

Error after crash
The previous system shutdown at 1:50:10 AM on ‎11/‎15/‎2009 was unexpected.

I have started both Speccy from piriform to keep track of internal heat and i have started resource monitor and will have them running over night and wil provide information about what happens before crash. in case it helps you guys out.

Enter event in your searchbox and open the event viewer windows logs applications and check for any critical errors.. take a screenshot ( snipping tool ) and attach it to your next post..

Send the Event Viewer as Tews recommends.

You can also look at this tutorial: Problem Steps Recorder

Have you ran any hardware tests?

Memory Diagnostics Tool
or
Memtest86

Run the memory tests 4-5 times.

Disk Check
or
Western Digitals Data Lifeguard Diagnostic for Windows

Let us know the results.

I have tried the following and received no errors.
Disk Checkmemory diagnostics tool

Your saying you ran the mem test?
How many times did you run it?
It's better to know if the RAM is going bad then to keep searching for other things, it will take 4-5 test runs to get a good test.


Read this thread, there are a couple of things to check.
Crashing daily (The computer has rebooted from a bugcheck)

Windows 7 blue screens and other woes

Try re-loading all your mother board drivers, chipset, check if there is a new BIOS version.

Let us know if any of these helps.