PC Keeps Shutting Off

Via technologies, inc. / Kt400a-8235
July 16, 2009 at 10:38:24
Specs: Microsoft Windows XP Home Edition, 1.832 GHz / 255 MB
My pc will shut off suddenly. A few days ago I had received an email with a .rar attachment of a chart of pictures of colors. My AV said it was safe so I opened and saved to my harddrive. When I opened it from there my pc immediately shut off. I have to unplug it and replug before it will start again each time it shuts off. I ran AV scan and it shows okay. I ran malwarebyte it says okay. Superantispyware says okay. I can't run any scans online, it will shut off. I ran ckdsk and it showed several things wrong and corrected them. I can't run sfc /scannow from cd or from my I386 folder, it will shut off. It will shut off if I try to run MEMTEST86 or hdd tests. I can surf okay and now open the picture file okay. I checked my cpu temp in bios the next day and it had jumped from my normal 112 -118 F. to 158 - 160 F. I took the side panel off and carefully cleaned everything and installed a new case fan (it never had one) and the temp goes up to 135F now. It is from 70F. to 80F. room temp where the pc is. I can put my finger on the cooling fins mounted on the cpu (I don't touch anything else for fear of static and I hold the case frame when I do this) and it is always cool. My PSU fan works and it is just warm at times. I changed the power connection cable. I went to update video drivers, it shuts off. Anything else to update, it shuts off. It shut off tuesday when I tried to let microsoft update. It took two tries then worked. I ran hijackthis and the log seemed okay but then again I'm not sure on this. I have minidump on but it doesn't leave a log in c:\windows. I did have a minidump in drwatson folder but when I checked this yesterday it was erased somehow. At first nothing was found in event viewer. Now in event viewer - system, it only has one warning that it has repeated the last few days--------

Event Type: Error
Event Source: Service Control Manager
Event Category: None
Event ID: 7000
Date: 7/14/2009
Time: 10:13:04 PM
User: N/A
Computer: EWA
The HDD & SSD access service service failed to start due to the following error:
The system cannot find the file specified.

or it will say it 'cannot find the path specified'.
It could be just coincidence the pc shut off when I clicked on the picture file. I don't know. I'm not any smart with the pc and I know it is old but it is all we have for now. This pc is not used for any gaming, just email, internet and simple stuff. I've googled a lot but it is mixed information I seem to find. I don't know if it is hardware, software, infected, little green aliens or just weird. Any help will be greatly appreciated from me before I lose my sanity.

Size: 74.53 GB
Operating System: Microsoft Windows XP home edition, (v5.1, build 3600) SP3
System Manufacturer: VIA Technologes, Inc.
Motherboard Model: KT400A-8235
Motherboard Vendor: Biostar
BIOS Model: Phoenix - AwardBIOS v6.00PG
Processor: AMD Sempron(tm) 2600+, MMX, 3DNow, ~1.8GHz
Memory: 256MB RAM
Info On Video Card- Model: ATI 9550 AGP8X 128MB TV-OUT DVI
GPU Code Name RV350 (AGP 8x 1002 / 4153, Rev 00)
GPU Clock 250 MHz (original: 250 MHz)
Memory Clock 196 MHz (original: 200 MHz)
Power Supply Unit: (It's what I read on the side)?
FEEL Mode Com, switching power supply, model: LC.B3DDATX, passive PFC, total output: 300w, 60hz-50hz (I'm 50hz)
Sensor Properties When Posted:
Motherboard- 55 °C (131 °F)
CPU- 57 °C (135 °F)
Aux- 30 °C (86 °F)
WDC WD800BB-22JHA0- 38 °C (100 °F)
Cooling Fans: CPU- 3750 RPM
Voltage Values: CPU Core- 1.54 V
+2.5: V 2.56 V
+3.3: V 3.18 V
+5 V: 5.00 V
+12 V: 11.52 V
+5 V Standby: 4.84 V
VBAT Battery: 3.17 V
One new case fan,
Monitor: one SyncMaster 720n, Samsung
Display Adapters: Radeon 9550 (RV350), Radeon 9550 Secondary (not updated)
Browsers: IE8, Google Chrome, Firefox- used the most
DirectX 9.oc
C-Media AC97 Audio Device
Anti-Virus: Avast home edition
Firewall: Online Armor
All Microsoft updates,
Email: Thunderbird
printer, scanner

Sorry if I've over posted info.

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July 16, 2009 at 13:44:02
If event logs fail to show crash then setup and see how to read dump logs.

"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10

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July 16, 2009 at 13:54:30
There is supposed to be a dump log. For some reason the pc refuses to leave a log now.

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July 16, 2009 at 15:58:38
There is no dump file if the pc just shuts off.

why answer when you don't know?

@ 1.8ghz that system is at least 3-5 years old. I have a couple in my basement collecting dust.

here are some tests to run:

Boot up and go into the bios. Stay here for awhile to see if it autoshuts down.

Come up in safe mode. Stay on the boot menu screen. See if it autoshuts down.

If it shuts down then the OS isn't the issue its hardware.

First stop is go into the bios and look to see if there are settings for shutting down the system if cpu / mainboard temps reach a certain point. Report back what those settings are. Make no changes.

If it doesn't shutdown when in the bios for awhile or the safe mode boot screen then boot up fully under safe mode. See if it shuts down.

Report back what you find. Thanks

BTW it won't harm anything to reseat the ram and all cables

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