ACPI Power Meter Driver (AcpiPmi) Service Defaults in Windows 7

ACPI Power Metering Driver by Microsoft Corporation.

Default Settings

Startup type:Manual
Display name:ACPI Power Meter Driver
Service name:AcpiPmi
Service type:kernel
Error control:normal
Path:%SystemRoot%\system32\DRIVERS\acpipmi.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AcpiPmi

Default Behavior

ACPI Power Meter Driver is a kernel device driver. In Windows 7 it won't be started if the user doesn't start it. If ACPI Power Meter Driver fails to start, Windows 7 attempts to write the failure details into Event Log. Then Windows 7 startup should proceed and the user should be notified that the AcpiPmi service is not running because of the error.

Restore Default Startup Configuration for ACPI Power Meter Driver

1. Run the Command Prompt as an administrator.

2. Copy the command below, paste it into the command window and press ENTER:

sc config AcpiPmi start= demand

3. Close the command window and restart the computer.

The AcpiPmi service is using the acpipmi.sys file that is located in the %WinDir%\system32\DRIVERS folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 7 installation media.