ntoskrnl.exe missing error

Hi Experts,
I start the computer but received an error saying: ntoskrnl.exe is missing so I could not start the computer, I tried to go into safe mode and choose different options like LAST KNOWN, SAFE MODE, SAFE MODE WITH NETWORKING and I was not successful and will display the same error. I tried to use the WINDOWS XP PRO cd to tried to do a Repair but it will load and it will give me a blue screen saying that has to stop to avoid damage to my computer.
I used a different computer to copy the file ntoskrnl.exe from a cd(i386) to a USB and copy the file then I boot the damage computer with UBUNTU running from a cd, connected the USB, copy the file ntoskrnl.exe to the local drive of the damage computer to system32\ then exit shut down UBUNTU then reload the computer, I do nit get the error any more but it keeps on looping going to the option to START COMPUTER NORMALLY, SAFE MODE or LAST KNOW and that's it. All I did was to copy the file and I do not know if I had to extracted and if I have to extracted please let me know how to do it.

Can you please advise.

Thanks
chenzoviccAsked:
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JohnBusiness Consultant (Owner)Commented:
There could be more damage than just the one file including a damaged registry.

Based on your description, boot back to Ubuntu and copy your important files and email onto a USB key.

Then delete all partitions on the computer, reinstall Windows XP and restore your files.

... Thinkpads_User
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Dan CraciunIT ConsultantCommented:
Before going into panic mode and re-installing Windows, I suggest you boot from your Windows CD, go to Recovery Console and there run
chkdsk c: /R

In my experience, that will often "cure" your system.

HTH,
Dan
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chenzoviccAuthor Commented:
Hi Dan,
Unfortunately I can not even get to the RECOVERY CONSOLE.
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Dan CraciunIT ConsultantCommented:
Please follow the steps from here: http://pcsupport.about.com/od/fixtheproblem/ss/rconsole.htm

and let me know where you get an error and what that error is.

PS: if you have another (working) computer, you can put the drive on that and use chkdsk from there (chkdsk X: /R , where X is the drive letter for your windows partition on the new computer).

HTH,
Dan
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JohnBusiness Consultant (Owner)Commented:
If your registry is damaged, CHKDSK cannot repair it, so be aware of that.

... Thinkpads_User
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Dan CraciunIT ConsultantCommented:
@Thinkpads_User: Sorry, but that is not true. When the a registry hive is corrupted (the famous "Windows could not start because the following file is missing or corrupt:\WINNT\SYSTEM32\CONFIG\SYSTEM") the first step is to run chkdsk on that disk, and in most cases that solves the problem.

PS: we probably come from different IT services. Most IT guys that work with home users or corporate users tend to prefer re-installing Windows: quick painless solution.
I work mostly with small businesses in technical/medical field that have old computers with licensed software that would be a nightmare to re-install (missing kits, dead authentication servers etc), so for me a re-install is often not a solution. That really gives us different perspectives.

HTH,
Dan
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JohnBusiness Consultant (Owner)Commented:
I should have said "in a number of cases chkdsk cannot fixit"  I have seen lots of cases where CHKDSK only creates further damage and does not solve a problem. That was the source of my comment.

If CHKDSK does work in this case, then of course, use it.

nightmare to re-install (missing kits, dead authentication servers

Yes, true. What I see is that, notwithstanding the above, lots of damage cannot economically be repaired. I make backups for all my installs now to prevent these kind of issues.

... Thinkpads_User
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nobusCommented:
you can always try ea system restore like this :
windows could not start because the following file is missing or corrupt:  \WINDOWS\SYSTEM32\CONFIG\SYSTEM
http://support.microsoft.com/kb/307545
----------------------------------------------------------------------------------------------
An easier way is to boot from a Bart PE CD (or UBCD4Win CD) and use the file manager for manipulating files. Here  the procedure :
1. rename c:\windows\system32\config\SYSTEM to c:\windows\system32\config\SYSTEM.bak
2. Navigate to the System Volume Information folder.
it contains some restore {GUID} folders such as "_restore{87BD3667-3246-476B-923F-F86E30B3E7F8}".
The restore points are in  folders starting with "RPx under this folder.
3. In such a folder, locate a Snapshot subfolder. This is an example of a folder path to the Snapshot folder:  C:\System Volume Information\_restore{D86480E3-73EF-47BC-A0EB-A81BE6EE3ED8}\RP1\Snapshot
4. From the Snapshot folder, copy the following file to the c:\windows\system32\config folder
 _REGISTRY_MACHINE_SYSTEM
5. Rename _REGISTRY_MACHINE_SYSTEM to SYSTEM
6. Exit Bart PE, reboot and test

Use a fairly recent restore point from at least a day or two prior to problem occurring .

** you can add the other hives also with this procedure

http://www.nu2.nu/pebuilder/       BARTPE
http://www.ubcd4win.com/            UBCD4WIN


****note : this assumes your hardware is ok !!
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chenzoviccAuthor Commented:
Sorry for not getting back to you soon. I will try tis weekend.
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LeeTutorretiredCommented:
I've requested that this question be deleted for the following reason:

Not enough information to confirm an answer.
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JohnBusiness Consultant (Owner)Commented:
@chenzovicc - You said you would come back to this question. Instead, it is just abandoned.

... Thinkpads_User
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chenzoviccAuthor Commented:
Thanks for your input, I tried everything and apologize for taking too long. I had to reinstall.
Thanks DanCracium I think you have a point.

Thanks
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