Windows Defender Boot Driver (WdBoot) Service Defaults in Windows 8

Windows Defender Boot Driver.

Default Settings

Startup type:Boot
Display name:Windows Defender Boot Driver
Service name:WdBoot
Service type:kernel
Error control:normal
Group:Early-Launch
Path:%SystemRoot%\system32\drivers\WdBoot.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WdBoot

Default Behavior

The Windows Defender Boot Driver service is a kernel device driver. In Windows 8 it is being loaded by Boot Loader before Kernel initialization. If Windows Defender Boot 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 WdBoot service hasn't been started.

Restore Default Startup Configuration for Windows Defender Boot Driver

1. Select your Windows 8 edition and update pack, and then click Download.

2. Save the Win8_WdBoot_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The WdBoot service is using the WdBoot.sys file that is located in the %WinDir%\system32\drivers folder. If the file is corrupted or deleted, you can put it back in there.