Extensible Authentication Protocol (EapHost) Service Defaults in Windows 8

The Extensible Authentication Protocol (EAP) service provides network authentication in such scenarios as 802.1x wired and wireless, VPN, and Network Access Protection (NAP). EAP also provides application programming interfaces (APIs) that are used by network access clients, including wireless and VPN clients, during the authentication process. If you disable this service, your computer is prevented from accessing networks that require EAP authentication.

Default Settings

Startup type: Manual
Display name:Extensible Authentication Protocol
Service name:EapHost
Service type:share
Error control:normal
Path:%SystemRoot%\System32\svchost.exe -k netsvcs
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\EapHost
  • SeTcbPrivilege
  • SeDebugPrivilege
  • SeImpersonatePrivilege

Default Behavior

Extensible Authentication Protocol is a Win32 service. In Windows 8 it will not be started until the user starts it. When the Extensible Authentication Protocol service is started, it runs as localSystem in a process of svchost.exe, sharing it with other services. If Extensible Authentication Protocol 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 EapHost service hasn't been started.


Extensible Authentication Protocol can't start, if any service from the list below is disabled or not available:

If Extensible Authentication Protocol is disabled, the Wired AutoConfig service will not be started and initialized.

Restore Default Startup Configuration of Extensible Authentication Protocol

Before you begin doing this, make sure that all the services on which Extensible Authentication Protocol depends are configured by default and function properly. See the list of dependencies above.

1. Run the Command Prompt as an administrator.

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

sc config EapHost start= demand

3. Close the command window and restart the computer.

The EapHost service is using the eapsvc.dll file that is located in the C:\Windows\System32 directory. If the file is removed or corrupted, read this article to restore its original version from Windows 8 installation media.