Microsoft KB Archive/283378

= You Must Hold Down the Power Button to Shut Down Windows NT 4.0 in a Dual-Boot Environment with Windows XP =

Article ID: 283378

Article Last Modified on 1/25/2006

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APPLIES TO


 * Microsoft Windows XP Home Edition
 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows NT 4.0 Service Pack 1
 * Microsoft Windows NT 4.0 Service Pack 2
 * Microsoft Windows NT 4.0 Service Pack 3
 * Microsoft Windows NT 4.0 Service Pack 4
 * Microsoft Windows XP Professional
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition

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This article was previously published under Q283378



SYMPTOMS
In a dual-boot environment with Windows XP and Windows NT 4.0, you cannot turn off the computer by pressing the power button once when you are prompted by Windows NT that it is safe to turn off the computer. To turn the power off, you have to hold down the power button for a minimum of 5 seconds for the computer to power off.



CAUSE
This behavior occurs because Ntldr always checks to see if Advanced Power Management (APM) is present. By design, the basic input/output system (BIOS) of the computer fails the APM call if the computer is configured to use Advanced Configuration and Power Interface (ACPI).



RESOLUTION
To shut down Windows NT 4.0 in a dual-boot environment with Windows XP, hold down the power button for 5 seconds or longer to completely turn the computer off.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. /

Additional query words: ACPI, APM, Power Button; Shut down; dual boot

Keywords: kbenv kbui kbprb KB283378

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