Computer restarts when defragging?

Hi

Seem to have a problem with my computer in that it restarts whenever I try to do a disk defrag.  It always seems to happen when the defrag progress is around 12% complete!  I have done a disk error check (from my computer > right click local disk (C:) > properties > tools > check now) and it turned out fine?  Anyone know why this would happen and how I can do a COMPLETE disk defrag without it restarting?

Thanks
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narmi2Asked:
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carl_legereCommented:
it sounds like symptoms that the disk's failure is near.  Download a disk check utility from the manufacturer of the drive (there is no universal program) that makes a boot disk, you boot from that and do the full disk test.

Because drives are prone to failure in general, I would use ghost to image the drive to another new driver, swap the drives and throw out or warranty RMA the old drive.
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Expert4XPCommented:
Have you looked at the system and application event log for clues as to the reason yet?

My computer/Right Click/Manage/Event Viewer

Look in Application and System and post what events are errors here, or search on event id with Google.
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narmi2Author Commented:
Thanks for the suggestions, I'll look into them as soon as I get home tonight!
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yesplease151Commented:
Probably a bad sector that is only getting hit when doing a defrag.  Run a chkdsk /r to find out for sure.
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tim_quiCommented:
It may be RAM issue, you might try swapping the sticks out.
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Expert4XPCommented:
Did anything show up in the Event Log (System or application)?  If so, please copy/paste a few of the errors here.
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narmi2Author Commented:
Hi

My computer just restarted again and I didnt even do a defrag!

carl_legere: I am about the download a diagnostic from seagate and will let you know.

Expert4XP: From the application event viewer there are not many errors, but here are 2 from today.

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The Virtual PC Application Services service failed to start due to the following error:
The service cannot be started, either because it is disabled or because it has no enabled devices associated with it.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
-----------------

-----------------
Error code 1000000a, parameter1 00000054, parameter2 00000002, parameter3 00000001, parameter4 804dbc8e.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
---------------

yesplease151: I have already done the disk check from windows my computer > right click local disk (C:) > properties > tools > check now.  Is that not the same as chkdsk?

I only just installed some new ram, 2 sticks or 1gb each crucial unbuff 128mx64 ddr pc3200.  I have not tried a defrag yet.  How do I check my new memory?

Thanks for the help
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tim_quiCommented:
You can use memtest; http://www.memtest86.com/


How old is the power supply?
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narmi2Author Commented:
Thanks!

I am currently running an extended seagate drive test.  Will do the memtest if nothing comes up.  The power supply is about 3 years old i think.

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tim_quiCommented:
A bad power supply is sometimes responsible for reboots.
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narmi2Author Commented:
Thanks for all the help so far.  I downloaded the tool from seagate and it reported the harddrive to be ok.  I have done all the tests suggested above and nothing came up.  But the computer still keeps restarting.

I have 2 harddrives in my computer.  1 with windows and the other with linux.  I use the bios to switch between harddrives so I can choose which os to use.

I thought I should try out the linux harddrive for a few days and it has NOT restarted at all.  But today I decided to use the windows harddrive again and eveythough the testing software reported nothing wrong with the harddrive the computer restarted within minutes.

So how can this be? all the software testing tools I tried say there is nothing wrong with the drive, yet when I use it is restarts.  I dont think there is anything else wrong with the computer because when i use the other harddrive with the linux installation on it, it does not restart.

So it seems like a harddrive problem but no testing software is able to pick up anything wrong with it?

Any suggestions?

p.s. i have windows xp on a 250gb harddrive and have linux ubuntu 5.10 on a 120gb harddrive.
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narmi2Author Commented:
how do i test for corupted files and fix them?
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narmi2Author Commented:
maybe its a corupted file which is making the computer restart when i defrag or search the harddrive?
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Expert4XPCommented:
To run the chkdsk (which will run when computer restarts):

Start/Run/cmd
chkdsk c: /r

The /r will cause a sector by sector check of the disk, so it will run for awhile, when your computer restarts.
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yesplease151Commented:
I already suggested that almost a month ago
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Expert4XPCommented:
yesplease, sorry.  I see your suggestion now.
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narmi2Author Commented:
yes i know

I tried it then and it said "volume is clear" and i tried it again and still said "volume is clean" ???
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narmi2Author Commented:
and it still keeps restarting
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