Microsoft Hardware Error Device Driver (ErrDev) Service Defaults in Windows 7

Error Device Driver by Microsoft Corporation.

Default Settings

Startup type:Manual
Display name:Microsoft Hardware Error Device Driver
Service name:ErrDev
Service type:kernel
Error control:normal
Group:Extended Base
Path:%SystemRoot%\system32\DRIVERS\errdev.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ErrDev

Default Behavior

Microsoft Hardware Error Device Driver is a kernel device driver. In Windows 7 it won't be started if the user doesn't start it. If Microsoft Hardware Error Device 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 ErrDev service is not running because of the error.

Restore Default Startup Configuration for Microsoft Hardware Error Device Driver

1. Select your Windows 7 edition and service pack, and then click Download.

2. Save the Win7_ErrDev_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The ErrDev service is using the errdev.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.