No, all I know is that the computer goes into a reboot.
I was thinking the same way you are, hoping that it is simply one file
I could copy to the faulty drive in order to solve the problem. This is
probably unlikely, but I am a dreamer!!
Well, I'll tell ya...
A frequent and easy to fix issue like this often involves a file
called userinit.exe. Malicious software can delete it, replace it or
corrupt it. It may not be your problem, but it happens a lot, is easy
to check and easy to fix.
Won't boot does not equal can't login. The userinit.exe controls both
logging in modes so if it is broken you will see the same problem in
Normal or any Safe Mode.
First build a Recovery Console CD, get that working and we can check
the userinit.exe issue. My copy/paste instructions from doing this
many, many times:
Eliminate or repair possible file system corruption from a power
failure, ungraceful shutdown or aborted restart.
Have any of these events occurred?
You should first boot your PC into the XP Recovery Console using a
bootable XP installation CD or a bootable CD with the XP Recovery
Console on it.
You can make a bootable Recovery Console CD by downloading an ISO file
and burning it to a CD.
The same XP Recovery Console commands can be run from the bootable
Recovery Console CD.
The bootable ISO image file you need to download is called:
xp_rec_con.iso
Download the ISO file from here:
http://www.mediafire.com/?ueyyzfymmig
Use this free and easy program to create your bootable CD:
http://www.imgburn.com/
It would be a good idea to test your bootable CD on the computer that
is working.
You may need to adjust the computer BIOS settings to use the CD ROM
drive as the first boot device instead of the hard disk. These
adjustments are made before Windows tries to load. If you miss it,
you will have to reboot the system again.
When you boot on the CD, follow the prompts:
Press any key to boot from CD...
The Windows Setup... will proceed.
Press 'R' to enter the Recovery Console.
Select the installation you want to access (usually 1: C:\WINDOWS)
You may be asked to enter the Administrator password (usually empty).
You should be in the C:\WINDOWS folder. This is the same as the C:
\WINDOWS folder you see in explorer.
RC allows basic file commands - copy, rename, replace, delete, cd,
chkdsk, fixboot, fixmbr, etc.
From the command prompt window run the chkdsk command on the drive
where Windows is installed to try to repair any problems on the
afflicted drive.
Running chkdsk is fine to run even if it doesn't find any problems.
Assuming your boot drive is C, run the following command:
chkdsk C: /r
Let chkdsk finish and correct any problems it might find. It may take
a long time to complete or appear to be 'stuck'. Be patient. If the
HDD light is still flashing, it is doing something. Keep an eye on
the percentage amount to be sure it is still making progress.
Remove the CD and type 'exit' to leave the RC and restart the
computer.
You do not have to adjust the BIOS again to boot on the HDD since the
CD will not be present.
After you get this preliminary process done, we will determine if it
is userinit.exe and fix it.