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
Object:localSystem
Path:%SystemRoot%\System32\svchost.exe -k netsvcs
File:%SystemRoot%\System32\eapsvc.dll
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\EapHost
Privileges:
  • 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.

Dependencies

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 for Extensible Authentication Protocol

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

2. Save the Win8_EapHost_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The EapHost service is using the eapsvc.dll file that is located in the %WinDir%\System32 folder. If the file is corrupted or deleted, you can put it back in there.