Hourly spontaneous reboots

Although this may be a hardware issue, the symptoms seem to be software related.

For the second time in two weeks arrived at work to find my computer had rebooted during the night (machine is left running to receive faxes). Event Viewer log shows 3:56am as the first instance and repeating every hour (w/in 60 seconds). No alerts are listed before the reboot. No BOSDs. No OS messages upon reboot.

Two weeks ago I performed all of the hardware tests, HDD, memory, installed a temp and voltage monitoring program. Device Manager shows no problems. Found info w/ Google search about "Haxdoor" virus, found none of its files on HDD (do have virus protection).

Anyone have advice?
thanks

 

Hi, MetalMan. Welcome to Windows BBS!

Do you have any scheduled tasks that are scheduled to run around that time?

• Click Start > All Programs > Accessories > System Tools > Scheduled Tasks

• Specifically what virus protection?
  • Do you have more than one anti-virus application installed?
  • Do you have two or more anti-virus applications running resident in memory ( "real-time ", "guard ", "watch ", or similar protection) at the same time?

Perhaps you are having system crashes but your computer is configured to automatically reboot instead of displaying a BSOD for a system crash.

Do you have any .DMP files listed in any of the following locations that are time-stamped during the early morning hours (around 3:56AM, for example)? In Windows Explorer, hover you mouse cursor over the file name to view the date/time-stamp of the file.

• C:\MEMORY.DMP
• C:\WINDOWS\MEMORY.DMP
• C:\WINDOWS\Minidump\Minixxxxxx-yy.dmp

When browsing the C:\WINDOWS\Minidump\ folder, look for dump files that are named as follows.

EDIT: Please carefully follow all the instructions in this link. Then paste a few of your most recent DebugWiz-generated BSOD dump log analysis reports in this thread.

The DebugWiz application should be run while connected to the Internet so your Windows Debugging Tools can retrieve the proper "symbols ". The additional information the DebugWiz-generated reports provide might help us identify the culprit more quickly.

NOTE:

 

Thanks for your time mailman.

No scheduled tasks.

CA anti-virus/spyware

System Failure is set to: "Write an event to system log "
"Send admin. alert "
not: "Auto. restart

No .DMP files associated with these reboots.

One thing common to both events, I ran chkdsk from Windows on the first occasion and on the second there was a Windows Update install both required a cold boot. Following the cold boot the spontaneous reboots stopped.

With only a few exceptions the software configuration of this machine is identical to another one built at the same time for the company owner and except for peripherals, hardware is identical.

 

You're welcome. Thanks for your feedback.

Are you saying your issue is now resolved?