Microsoft ACPI Control Method Battery Driver (CmBatt) Service Defaults in Windows 7

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

Microsoft ACPI Control Method Battery Driver is a kernel device driver. In Windows 7 it won't be started if the user doesn't start it. If Microsoft ACPI Control Method Battery Driver fails to start, Windows 7 attempts to write the failure details into Event Log. Then Windows 7 startup should proceed and the user should be notified that the CmBatt service is not running because of the error.

Restore Default Startup Configuration for 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 %WinDir%\system32\DRIVERS folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 7 installation media.