APM Standby Option Is Missing on PCs Without a Battery

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This article was previously published under Q247290

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SYMPTOMS

When you install Microsoft Windows 2000 Professional on an older portable computer that does not have a battery, and then enable Advanced Power Management (APM) on the computer, there is no Standby option in the Shut Down Windows dialog box.

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CAUSE

This behavior occurs because although Windows 2000 primarily supports the Advanced Configuration and Power Interface (ACPI) standard, it also includes APM to support upgrading of older, non-batteried portable computers to Windows 2000. Such computers can benefit from the APM 'power-off' feature. Newer portable computers support ACPI, which provides full power management functionality.

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