Extensible Authentication Protocol (EapHost) Service Defaults in Windows 7

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 7 it won't be started if the user doesn't start it. When the Extensible Authentication Protocol service is started, it is running as localSystem in a shared process of svchost.exe. Other system components, such as drivers and services, may run in the same process. If Extensible Authentication Protocol 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 EapHost service is not running because of the error.

Dependencies

Extensible Authentication Protocol is unable to start, if at least one of the following services is stopped or disabled:

If Extensible Authentication Protocol is stopped, the following services cannot start:

Restore Default Startup Configuration for Extensible Authentication Protocol

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

2. Save the Win7_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 changed, damaged or deleted, you can restore its original version from Windows 7 installation media.