Could be a timing problem with the controller.  Read here:

INFO: Windows NT 4.0 Setup Troubleshooting Guide
http://support.microsoft.com/kb/126690/EN-US/

Troubleshooting Stop 0x0000007B or "0x4,0,0,0" Error
http://support.microsoft.com/kb/q122926/

John

possible hardware conflict or compatibility problem, what type of disk
interface are you using (ide, scsi)?

What is your partition structure? Win NT Setup is unable to handle
structures prepared by newer operating systems. If you can, use NT setup
itself to prepare partition structure or put this disk as secondary to
another Windows NT running machine and use its disk manager to prepare disk.
The second method is prefferred in case you need advanced structure or
longer partitions (Win NT setup is unable to create partitions over 4GB
size). It is highly recommended to have whole primary partition (c: drive)
within the first 8GB of physical disk space. Due this limitation it is
better to divide disk to more partitions even in case you are installing
only one OS. If you are installing more operating systems, install them in
correct order (from oldest to newest and always apply last servicepack
before adding next OS) and put each OS to different partition (exeption is
MS-DOS that should coexist with Win-9x system on primary partition and can
coexist also with one copy of Win NT without problems). Minimal recommended
size of primary partition is 150MB (to be able to install emergency NT OS
copy to it), but better is at least 300MB (required for servicepacks). Even
if you have plenty of space, dont make it over 2GB. You can even install
this "emergency" copy of NT first and use it to prepare rest of disk for
"runtime" Win NT copy (very useful in case of RAID you cannot put to another
machine for preformatting).

Some compatibility problems can be solved by using the F6 key trick. On
beginning of NT setup, when black screen with message like "NT setup is
inspecting your hardware..." appears (message may vary depending on OS
version and language), press a few times F6 key on keyboard. This has no
immediate effect (thats why you need to press it repeatedly - just for
sure), but NT setup will not run autodection of mass storage devices and
(logically) will not autoload any mass storage device driver. This prevent
computer hangs due detection routines and this also prevent resource
conflicts between autoloaded and manually loaded drivers. NT setup needs to
know at least disk device driver for next part of setup so it will brings
you mass storage driver selection screen sooner than normally (you will get
it two times during this setup procedure).  Here you should to select proper
disk driver (or better provide floppy disk with newest version of it) to be
able to continue in setup. Important note: because F6 key disabled
autoloading, you usually need to manually load also ATAPI-CD rom driver in
case you are installing from IDE connected CD-ROM device. Othervise your
setup will fail after switching to protected mode phase due inaccessible
installation media. In case of SCSI CDs or in case you are installing from
disk, it is not necessary.

Hi Edmund,

What state is the Hard Disk Drive you are attempting to install NT4 onto
in ??? (Blank, has some other OS on it, etc... )

As other advise in answer to your question has already noted, NT4 can
have problems dealing with partitions prepared/created by other OSes. It
CERTAINLY WON'T be able to deal with (for example) a FAT32 partition !

Have a read here:

http://nt4ref.zcm.com.au/bigdisk.htm

This should give you a few starting points.

Calvin.