Microsoft KB Archive/155020

= Cannot Boot Windows NT from CD-ROM =

Article ID: 155020

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition

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This article was previously published under Q155020





SYMPTOMS
A computer that can boot from the CD-ROM drive may not be able to boot from the Windows NT 4.0 CD-ROM.



CAUSE
A computer can boot from the Windows NT CD-ROM only if both the SCSI BIOS and the system BIOS support the El Torito specification. Computers that do not successfully boot from the Windows NT CD-ROM either do not support the specification or do not support it fully.

There are three ways to support the El Torito specification: Emulating a floppy disk, emulating a hard disk, or using no emulation. Windows NT requires using no emulation.



RESOLUTION
Some computers have a configuration tool that permits you to choose the boot order among the floppy disk drive, hard disk, or CD-ROM drive. If your computer has a configurable boot order, verify that the CD-ROM drive is first in the sequence, and set to No Emulation.

If your computer is not configurable, or does not adhere to the El Torito specification, contact your computer's manufacturer for information concerning an upgrade.



MORE INFORMATION
The following computers are known to exhibit this behavior:
 * Compaq ProLiant 4000
 * Compaq ProLiant 4500

Keywords: kbenv KB155020

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