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Componentized Windows Services

The Windows operating system provides numerous services that may be required to support the capabilities of any given run-time image. This topic contains a summary that relates Windows services to the files that implement them, and to the components that provide those files. This is not an exhaustive listing.

Some Windows services run within the context of other processes, including the following:

  • Service Host Process, which is contained in the svchost.exe file
  • Windows Service Controller, which is contained in the services.exe file
  • Local Security Authority Subsystem (LSASS), which is contained in the lsass.exe file

The Service Host Process is a generic host process for services that run from dynamic-link libraries. The Windows Service Controller is an application that starts, stops, and interacts with system services. LSASS manages Windows security mechanisms.

A Windows service that runs within the context of a process may have a dependency on that process or require that process to run.

The following table lists Windows Services and the components that provide them. For more information about the components, see the Component Help Reference in Windows XP Embedded Studio Help.

Windows serviceFile nameComponent name
AlerterAlrSvc.dll

This service runs within the context of SvcHost.exe.

Alerter Service
Application Layer Gateway ServiceAlg.exeWindows Firewall/Internet Connection Sharing (ICS)
Application ManagementAppMgmts.dll

This service runs within the context of SvcHost.exe.

Software Installation Group Policy Extension
ASP.NET State ServiceAspnet_state.exeASP.NET 1.1
Automatic UpdatesWuauServ.dll

This service runs within the context of SvcHost.exe.

Windows Update Agent
Background Intelligent Transfer ServiceQmgr.dll

This service runs within the context of SvcHost.exe.

Background Intelligent Transfer Service
Bluetooth Support Service (BthServ)Bthci.dllClass Install Library - Bluetooth
ClipBookClipSrv.exeAccessories/System Tools
COM+ Event SystemEs.dll

This service runs within the context of SvcHost.exe.

COM+ Services
COM+ System ApplicationDllHost.exe /Processid:{02D4B3F1-FD88-11D1-960D-00805FC79235}COM+ Services
Computer BrowserBrowser.dll

This service runs within the context of SvcHost.exe.

Computer Browser Service
Cryptographic ServicesCryptSvc.dll

This service runs within the context of SvcHost.exe.

Core Certificate Services
Device Update AgentDuagent.exeDevice Update Agent
DHCP ClientDhcpcSvc.dll

This service runs within the context of SvcHost.exe.

DHCP Client Service
Distributed Transaction CoordinatorMsDtc.exeDistributed Transaction Coordinator (MSDTC)
DNS ClientDHCPSvc.dll

This service runs within the context of SvcHost.exe.

DHCP Client Service
Enhanced Write FilterEwfdll.dllEnhanced Write Filter
Error Reporting ServiceErSvd.dll

This service runs within the context of SvcHost.exe.

Error Reporting
Event LogEventLog.dll

This service runs within the context of Services.exe.

Event Log
Fast User Switching CompatibilityShsvcs.dll

This service runs within the context of SvcHost.exe.

User Interface
Help and SupportHelpSvc.exe

This service runs within the context of SvcHost.exe.

Help and Support Services
Human Interface Device AccessHidServ.dll

This service runs within the context of SvcHost.exe.

In Target Designer, all components under Hardware | Devices | Human Interface Devices
IIS AdminINetInfo.exeIIS Core Libraries
IMAPI CD-Burning COM ServiceImapi.exeIMAPI - CD Burning
Indexing ServiceCiSvc.exeIndexing Service
Internet Connection Firewall (ICP) / Internet Connection SharingFwcfg.dll

This service runs within the context of SvcHost.exe.

Windows Firewall/Internet Connection Sharing (ICS)
Policy Agent (IPSec Services)This service is installed by Nettcpip.inf.

This service runs within the context of Lsass.exe.

IP Security Tools and User Interface
Logical Disk ManagerDmServer.dll

This service runs within the context of SvcHost.exe.

Disk Management Services
Logical Disk Manager Administrative ServiceDmAdmin.exeDisk Management Services
MessengerMsgSvc.dll

This service runs within the context of SvcHost.exe.

Messenger Service (Net Send)
MS Software Shadow Copy ProviderDllHost.exe /Processid:{6C9935F1-B492-4EFD-95D2-E00161E84328}COM Base
Net LogonNetLogon.dll

This service runs within the context of Lsass.exe.

NetLogon/NetJoin
NetMeeting Remote Desktop SharingMnmSrvc.exeNetMeeting
Network ConnectionsNetman.dll

This service runs within the context of SvcHost.exe.

Primitive: Netman
Network DDENetDDE.exeNetwork Dynamic Data Exchange (NetDDE)
Network DDE DSDMNetDDE.exeNetwork Dynamic Data Exchange (NetDDE)
Network Location Awareness (NLA)Mswsock.dll

This service runs within the context of SvcHost.exe.

Network Location Awareness Service
Performance Logs and AlertsSmLogSvc.exePerformance Logs and Alerts Service
Portable Media Serial NumberMspmsnsv.dll

This service runs within the context of SvcHost.exe.

Windows Media Player 10 Technologies
Print SpoolerSpoolSv.exePrint Spooler
Protected StoragePstorec.dll

This service runs within the context of Lsass.exe.

Protected Storage Service
QoS RSVPRsvp.exeQuality of Service RSVP
Remote Access Auto Connection ManagerRasmans.dll

This service runs within the context of SvcHost.exe.

Dial-Up Networking Common Libraries
Remote Access Connection ManagerSessMgr.exe

This service runs within the context of SvcHost.exe.

Terminal Services Remote Assistance Component
Remote Desktop Help Session ManagerSessMgr.exeTerminal Services Remote Assistance Component
Remote Procedure Call (RPC)Rpcss.dll

This service runs within the context of SvcHost.exe.

RPC Server
Remote Procedure Call (RPC) LocatorLocator.exeRPC Named Service
Remote RegistryRegSvc.dll

This service runs within the context of SvcHost.exe.

Remote Registry Service
Removable StorageNtmssvc.dll

This service runs within the context of SvcHost.exe.

Removable Storage Service
Routing and Remote AccessMprdim.dll

This service runs within the context of SvcHost.exe.

Dial-up Server for Windows
Secondary LogonSecLogon.dll

This service runs within the context of SvcHost.exe.

RunAs Service
Security Accounts ManagerSamLib.dll

This service runs within the context of Lsass.exe.

Security Accounts Manager Client
ServerSrvSvc.dll

This service runs within the context of SvcHost.exe.

File Sharing
Shell Hardware DetectionShSvcs.dll

This service runs within the context of SvcHost.exe.

User Interface Core
Simple Mail Transfer Protocol (SMTP)INetInfo.exeIIS Core Libraries
Smart CardSCardSvr.exeSmart Card Subsystem
Smart Card HelperSCardSvr.exeSmart Card Subsystem
SSDP Discovery ServiceSsdpSrv.dll

This service runs within the context of SvcHost.exe.

Universal Plug & Play
System Event NotificationSens.dll

This service runs within the context of SvcHost.exe.

System Event Notification Service (SENS)
System Restore ServiceSrSvc.dll

This service runs within the context of SvcHost.exe.

System Restore Core
Task SchedulerSchedSvc.dll

This service runs within the context of SvcHost.exe.

Task Scheduler
TCP/IP NetBIOS HelperImhSvc.dll

This service runs within the context of SvcHost.exe.

NetBIOS over TCP/IP
TelephonyTapiSrv.dll

This service runs within the context of SvcHost.exe.

Telephony
TelnetTlntsvr.exeTelnet Server
Terminal ServicesTermSrv.dll

This service runs within the context of SvcHost.exe.

Terminal Services Core
ThemesUxTheme.dll

This service runs within the context of SvcHost.exe.

Primitive: Uxtheme
Uninterruptible Power SupplyUps.exeUninterruptible Power Supply Service
Universal Plug and Play Device HostUPnPHost.dll

This service runs within the context of SvcHost.exe.

Universal Plug & Play Device Host
Volume Shadow CopyVsSvc.exeVolume Shadow Copy Service
WebClientWebclnt.dll

This service runs within the context of SvcHost.exe.

Webdav Client Redirector
Windows AudioAudioSrv.dll

This service runs within the context of SvcHost.exe.

Microsoft Audio Compression Manager (MME Core)
Windows Image Acquisition (WIA)WIAservc.dll

This service runs within the context of SvcHost.exe.

Windows Image Acquisition Core
Windows InstallerMsiExec.exeWindows Installer Service
Windows Management InstrumentationWMIsvc.dll

This service runs within the context of SvcHost.exe.

WMI Core
Windows Management Instrumentation Driver ExtensionsAdvapi32.dll

This service runs within the context of SvcHost.exe.

Windows API - Advanced
Windows TimeW32Time.dll

This service runs within the context of SvcHost.exe.

Time Service Core
Wireless Zero ConfigurationWzcSvc.dll

This service runs within the context of SvcHost.exe.

Primitive: Wzcsvc
WMI Performance AdapterWMIapsrv.exeWMI Core
WorkstationWksSvc.dll

This service runs within the context of SvcHost.exe.

Workstation Service
World Wide Web PublishingINetInfo.exeIIS Core Libraries

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