ACPI Wake Alarm Driver (acpitime) Service Defaults in Windows 10

ACPI Wake Alarm by Microsoft Corporation.

Default Settings

Startup type: Manual
Display name:ACPI Wake Alarm Driver
Service name:acpitime
Service type:kernel
Error control:normal
Group:Extended Base
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\acpitime

Default Behavior

ACPI Wake Alarm 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 Wake Alarm 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 acpitime service has failed to start due to the error.

Restore Default Startup Configuration of ACPI Wake Alarm 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 acpitime start= demand

3. Close the command window and restart the computer.

The acpitime service is using the acpitime.sys file that is located in the C:\Windows\System32\drivers directory. If the file is removed or corrupted, read this article to restore its original version from Windows 10 installation media.