Microsoft ACPI Driver - Windows 7 Service
ACPI Driver for NT by Microsoft Corporation.
This service also exists in Windows 10, 11, 8, Vista and XP.
Startup Type
| Windows 7 edition | without SP | SP1 |
|---|---|---|
| Starter | Boot | Boot |
| Home Basic | Boot | Boot |
| Home Premium | Boot | Boot |
| Professional | Boot | Boot |
| Ultimate | Boot | Boot |
| Enterprise | Boot | Boot |
Default Properties
| Display name: | Microsoft ACPI Driver |
| Service name: | ACPI |
| Type: | kernel |
| Path: | %WinDir%\system32\DRIVERS\ACPI.sys |
| Error control: | critical |
| Group: | Boot Bus Extender |
Default Behavior
The Microsoft ACPI Driver service is a kernel driver. If the Microsoft ACPI Driver fails to load or initialize, the error is logged and the computer attempts to restart with the LastKnownGood configuration. If the LastKnownGood configuration fails, Windows 7 startup also fails, and the boot process halts with a Stop error. If you disable this service, Windows 7 will fail to start. Do NOT change this service startup configuration if your computer is working.
Restore Default Startup Type of Microsoft ACPI Driver
Automated Restore
1. Select your Windows 7 edition and Service Pack, and then click on the Download button below.
2. Save the RestoreMicrosoftACPIDriverWindows7.bat file to any folder on your hard drive.
3. Right-click the downloaded batch file and select Run as administrator.
4. Restart the computer to save changes.
Note. Make sure that the ACPI.sys file exists in the %WinDir%\system32\DRIVERS folder. If this file is missing you can try to restore it from your Windows 7 installation media.