Compbatt Service Defaults in Windows 7

Composite Battery Driver by Microsoft Corporation.

Default Settings

Startup type:Manual
Display name:Compbatt
Service name:Compbatt
Service type:kernel
Error control:critical
Group:System Bus Extender
Path:%SystemRoot%\system32\DRIVERS\compbatt.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Compbatt

Default Behavior

Compbatt is a kernel device driver. In Windows 7 it won't be started if the user doesn't start it. If Compbatt fails to load, Windows 7 attempts to write the error data into Event Log and restart the computer, using the Last Known Good configuration. If the Last Known Good configuration is not valid, Windows 7 startup ends with a Stop error. If you remove or disable the Compbatt service, Windows 7 won't start.

Restore Default Startup Configuration for Compbatt

1. Run the Command Prompt as an administrator.

2. Copy the command below, paste it into the command window and press ENTER:

sc config Compbatt start= demand

3. Close the command window and restart the computer.

The Compbatt service is using the compbatt.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.