xp keeps rebooting

an xp system that spontaneously reboots. i can boot successfully in safe mode. i've disabled all startup commands. i've been able to successfully do a system restore, but the problem persists.
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John KratzerCommented:
Have you scanned the system for Malware and viruses?

Visualy check you mainboard.  See if you have any visible bad capacitors.

Boot from and run a system test/benchmark utility.

Follow these leads and it will show you where they problem lies.
Do you check the computer power supply?
Rob MinersCommented:
Boot into Safe Mode

1.      Press the WinKey + Pause
2.      Click Advanced and under Startup and Recovery select Settings.
2a.      If using Vista or Windows 7 select Advanced system settings, then Startup and Recovery.
3.      Uncheck Automatically restart.
4.      Click on the dropdown arrow under Write debugging information.
5.      Select Small memory dump (64 KB) and the output is %SystemRoot%\Minidump.
6.      Restart the PC normally as this will allow the System to Blue Screen with a Stop error code and create a Minidump file.

The location of the Minidump Files can be found here. eg: C:\WINDOWS\Minidump\Mini000000-01.dmp

Post the minidump file for an EE Expert to have a look at for you.
The Five Tenets of the Most Secure Backup

Data loss can hit a business in any number of ways. In reality, companies should expect to lose data at some point. The challenge is having a plan to recover from such an event.


1. Bad Memory
2. Power supply
3. Motherboard or device like  a video card
4. Virus or Malware or bad driver

Use process of elimination to troubleshoot

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Dave BaldwinFixer of ProblemsCommented:
Was it originally an XP system?  I had one machine that did that because someone had tried to put XP on a machine that came with Vista and the video drivers were not available for XP.  Safe Mode uses a VGA driver but regular mode uses the regular Windows video driver.
while booting your system before windows starting up press F8 and choose
"Disable automatic restart on system failure" so that the blue screen will appear to you specifying the error code and discription, where usually it hardware issue or os corrupted/missing system file
jvaaazAuthor Commented:
alter cannot be started in safe mode.

might be able to check memory and power supply
might even be able to check video card
but no way to check motherboard.
Rob MinersCommented:
You can still untick Automatically Restart in Safe Mode, just click Ok as you close out. The Alerter service will startup as you enter Normal Mode.

The Capacitors can be visually checked around the CPU for swelling or bulging, as jkratzer has suggested. They should have a flat head with a cross indent.

The Ultimate Boot CD can be downloaded to use to test your System if you haven't already access to testing software.

jvaaazAuthor Commented:
i am too tired to work on this any longer today. thanks for your suggestions. i'll start fresh tomorrow. [TZ8].
check for errors in event logs
it can have many different causes, even overheating
jvaaazAuthor Commented:
either memory or most likely processor. 12 years old system. go a new one and will as some conversions questions in proper place.
Jvaaaz,     12 year old system getting up there in age however my home system is 11 years old still running however someday i might be in the same boat as you.  
no errors in event logs?
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Windows XP

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