ACPI Processor Aggregator Driver (acpipagr) Service Defaults in Windows 10

ACPI Processor Aggregator Device Driver by Microsoft Corporation.

Default Settings

Startup type:Manual
Display name:ACPI Processor Aggregator Driver
Service name:acpipagr
Service type:kernel
Error control:normal
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\acpipagr

Default Behavior

ACPI Processor Aggregator Driver is a kernel device driver. In Windows 10 it is starting only if the user, an application or another service starts it. If ACPI Processor Aggregator Driver fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the acpipagr service has failed to start due to the error.

Restore Default Startup Configuration for ACPI Processor Aggregator 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 acpipagr start= demand

3. Close the command window and restart the computer.

The acpipagr service is using the acpipagr.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 10 installation media.