This article was previously published under Q134285
This article has been archived. It is offered "as is" and will no longer be updated.
When you install Windows NT on an Enhanced IDE (EIDE) hard disk, you mayreceive one of the following error messages:
STOP: 0x0000007B Inaccessible Boot Device
Setup has encountered a fatal error that prevents it from continuing. Contact your software representative for help. The following status codes will assist them "0x4, 0, 0, 0"
This behavior can occur if any of the following conditions exist:
Your computer is infected with a virus.
There is a problem in the Atapi.sys driver.
To resolve this problem, follow these steps:
Run anti-virus software to check for and to remove any virus.
If your computer is not infected with a virus, obtain and install the latest Windows NT 3.51 Service Pack.
To successfully install Windows NT 3.51, you must replace the Atapi.sysfile on the Windows NT CD-ROM with the expanded version of Atapi.sy_(still compressed) available with the latest Windows NT 3.51 Service Pack:
Insert the Windows NT 3.51 CD-ROM in your CD-ROM drive.
Copy the Windows NT 3.51 source files from the Windows NT CD-ROM to a temporary directory on your hard disk. For example, create a directory named NTFLAT, and then copy the source files to the NTFLAT directory.
Insert the Service Pack CD-ROM in your CD-ROM drive.
PKUNZIP the Windows NT v3.51 service pack in a temporary directory. To do so, type the following command at a command prompt:
Pkunzip -d NT_SERVICE_PACK_NAME.ZIP c:\sptemp
Copy the ATAPI.SYS from the expanded service pack directory to the C:\NTFLAT installation directory or type the following command to expand the compressed Atapi.sys file on the service pack CD-ROM to the C:\NTFLAT directory:
Install Windows NT 3.51 from the temporary directory by typing the following command at a command prompt:
After you finish installing Windows NT V3.51, install the complete Service Pack.
Microsoft has confirmed this to be a problem in Windows NT version 3.51.This problem has been corrected in the latest U.S. Service Pack forWindows NT version 3.51. For information on obtaining the Service Pack,query on the following word in the Microsoft Knowledge Base (without thespaces):