Microsoft ACPI Control Method Battery Driver (CmBatt) Service Defaults in Windows 8
Control Method Battery Driver by Microsoft Corporation.
Default Settings
| Startup type: | Manual |
| Display name: | Microsoft ACPI Control Method Battery Driver |
| Service name: | CmBatt |
| Service type: | kernel |
| Error control: | normal |
| Path: | %SystemRoot%\System32\drivers\CmBatt.sys |
| Registry key: | HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CmBatt |
Default Behavior
The Microsoft ACPI Control Method Battery Driver service is a kernel device driver. In Windows 8 it will not be started until the user starts it. If Microsoft ACPI Control Method Battery Driver fails to start, the error details are added to Windows 8 error log. When the operating system startup is complete, the user is being notified that the CmBatt service hasn't been started.
Restore Default Startup Configuration of Microsoft ACPI Control Method Battery 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 CmBatt start= demand
3. Close the command window and restart the computer.
The CmBatt service is using the CmBatt.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 8 installation media.