Microsoft ACPI Driver Service Defaults in Windows 8

ACPI Driver for NT by Microsoft Corporation.

Default Settings

Startup type:Boot
Display name:Microsoft ACPI Driver
Service name:ACPI
Service type:kernel
Error control:critical
Group:Core
Path:%SystemRoot%\System32\drivers\ACPI.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ACPI

Default Behavior

The Microsoft ACPI Driver service is a kernel device driver. In Windows 8 it is being loaded by Boot Loader before Kernel initialization. If Microsoft ACPI Driver fails to load or initialize, the error details should be automatically logged. Then Windows 8 is restarting the PC and attempting to use the Last Known Good configuration. If the Last Known Good configuration isn't working properly, Windows 8 startup ends with a Stop error. If you disable the ACPI service, Windows 8 will fail to start.

Restore Default Startup Configuration for Microsoft ACPI Driver

1. Run the Command Prompt as an administrator.

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

sc config ACPI start= boot
sc start ACPI

3. Close the command window and restart the computer.

The ACPI service is using the ACPI.sys file that is located in the %WinDir%\System32\drivers folder. If the file is corrupted or deleted, you can put it back in there.