NT - "couldn't find NTLDR" - HUGE PROBLEM

Please Help!!
For the last couple of months we have been plagued by NT machines not booting up because of NTLDR missing. We get anywhere between 5 nad 15 NT machines fail every day due to this problem. Replacing the ntldr does not work as this is not the only file that is missing from the affected machines. It is obvious that there are other system files missing and we ofeten have to reinstall the o/s and all software. The only logical explaination is a virus but we have our antivirus protection up to date and I haven't come across a virus that causes this type of problem on such a large scale. This problem has also affected machines that are only used as print servers and have no applications or email installed on them.
We sometimes have the same pc's go down week after week and there are still a handful of pc's that have never been affected. This problem has been going on for so long now and we are all at our wits end trying to fire fight the issue. No one seems to be able to come up with a solution but we real really need to get it resolved. Please help if you can as we are desperate for any assistance to eradicate this problem.

Many thanks
MMURRAYAsked:
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elveyConnect With a Mentor Commented:
Perhaps you are overwriting the boot.ini files!
 
Create NT boot disks for each machine - this will solve the problem for sure.

(I don't have the instructions handy; they're in the Windows NT Resource Kit manual.  Basically, copy boot.ini, ntldr, ntdetect.com, and bootsect.dos to a floppy.)

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MMURRAYAuthor Commented:
Adjusted points from 50 to 400
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1technocratCommented:
1.  What Hardware (Compaq, Dell etc.)

2.  Do you have a support contract (Hardware Vendor, Microsoft)

If it is happening to a majority of machines it is setup or HW Related.  I would skip this group and get on the phone with your HW Vendor Support or MS Support.

A virus is not a logical explination.  

Check your Hardware Vendors Site for patches or updates.

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peyoCommented:
1. Pop open some of the machines...  What kind of hard drives do you have?

2. You've probably done this, but we need to ask:Have you done a surface scan of the hard drives? Have they turned up anything fishy?
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joebananaCommented:
I would also say you have a major problem (Hardware very possible).

Are you ghosting the machines or doing any other type of replication?  Is it possible anyone is tampering with the machines?  This shouldn't happen unless you have a bad batch of hard drives, and even then very unlikely.

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