Table F-1 contains a list of the default services you'll find installed on a Windows Server 2003 system and their default startup type and status.
Table F-1. List of default services in Windows Server 2003
Display name | Service name | Startup type/status | Description |
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Alerter | alerter | Disabled/Stopped | Notifies selected users and computers of administrative alerts. If the service is stopped, programs that use administrative alerts will not receive them. |
Application Layer Gateway Service | alg | Manual/Stopped | Provides support for application-level protocol plug-ins and enables network connectivity. |
Application Management | appmgmt | Manual/Stopped | Processes installation, removal, and enumeration requests for Active Directory IntelliMirror group policy programs. If the service is disabled, users will be unable to install, remove, or enumerate any IntelliMirror programs. |
Automatic Updates | wuauserv | Automatic/Started | Enables the download and installation of critical Windows updates. If the service is disabled, the operating system can be manually updated at the Windows Update Web site. |
Background Intelligent Transfer Service | bits | Manual/Started | Transfers data between clients and servers in the background. If BITS is disabled, features such as Windows Update will not work correctly. |
ClipBook | clipsrv | Disabled/Stopped | Enables ClipBook Viewer to store information and share it with remote computers. |
COM+ Event System | eventsystem | Manual/Started | Supports System Event Notification Service (SENS), which distributes events to subscribing Component Object Model (COM) components. |
COM+ System Application | comsysapp | Manual/Stopped | Manages the configuration and tracking of COM+-based components. If the service is stopped, most COM+-based components will not function properly. |
Computer Browser | browser | Automatic/Started | Maintains an updated list of computers on the local network and supplies this list to computers designated as browsers. |
Cryptographic Services | cryptsvc | Automatic/Started | Provides three management services: Catalog Database Service, which confirms the signatures of Windows files; Protected Root Service, which adds and removes Trusted Root Certification Authority certificates from this computer; and Key Service, which helps enroll this computer for certificates. |
DHCP Client | dhcp | Automatic/Started | Registers and updates IP addresses and Domain Name System (DNS) records for this computer. If this service is stopped, this computer will not receive dynamic IP addresses and DNS updates. |
Distributed File System | dfs | Automatic/Started | Integrates disparate file shares into a single, logical namespace and manages these logical volumes distributed across a local or wide area network. |
Distributed Link Tracking Client | trkwks | Automatic/Started | Enables client programs to track linked files that are moved within an NTFS volume, to another NTFS volume on the same computer, or to an NTFS volume on another computer. |
Distributed Link Tracking Server | trksvr | Disabled/Stopped | Enables the Distributed Link Tracking Client service within the same domain to provide more reliable and efficient maintenance of links within the domain. |
Distributed Transaction Coordinator | msdtc | Automatic/Started | Coordinates transactions that span multiple resource managers, such as databases, message queues, and file systems. |
DNS Client | dnscache | Automatic/Started | Resolves and caches DNS names for this computer. |
Error Reporting Service | ersvc | Automatic/Started | Collects, stores, and reports unexpected application crashes to Microsoft. If this service is stopped, Error Reporting will occur only for kernel faults and some types of user mode faults. |
Event Log | eventlog | Automatic/Started | Enables event log messages issued by Windows-based programs and components to be viewed in Event Viewer. This service cannot be stopped. |
File Replication | ntfrs | Manual/Stopped | Allows files to be automatically copied and maintained simultaneously on multiple servers. |
Help and Support | helpsvc | Automatic/Started | Enables Help and Support Center to run on this computer. If this service is stopped, Help and Support Center will be unavailable. |
HTTP SSL | httpfilter | Manual/Stopped | Implements the secure hypertext transfer protocol (HTTPS) for the HTTP service, using the Secure Socket Layer (SSL). |
Human Interface Device Access | hidserv | Disabled/Stopped | Enables generic input access to Human Interface Devices (HID), which activates and maintains the use of predefined hot buttons on keyboards, remote controls, and other multimedia devices. If this service is stopped, hot buttons controlled by this service will no longer function. |
IMAPI CD-Burning COM Service | imapiservice | Disabled/Stopped | Manages CD recording using Image Mastering Applications Programming Interface (IMAPI). If this service is stopped, this computer will be unable to record CDs. |
Indexing Service | cisvc | Disabled/Stopped | Indexes contents and properties of files on local and remote computers; provides rapid access to files through flexible querying language. |
Internet Connection Firewall (ICF)/Internet Connection Sharing (ICS) | sharedaccess | Disabled/Stopped | Provides network address translation, addressing, name resolution, and/or intrusion prevention services for a home or small office network. |
Intersite Messaging | ismserv | Disabled/Stopped | Controls the exchange of messages (i.e., replication) between domain controllers using either remote procedure call (RPC) or SMTP. |
IPSEC Services | policyagent | Automatic/Started | Provides end-to-end security between clients and servers on TCP/IP networks. |
Kerberos Key Distribution Center | kdc | Disabled/Stopped | On domain controllers, this service enables users to log on to the network using the Kerberos authentication protocol. If this service is stopped on a domain controller, users will be unable to log on to the network using that DC. |
License Logging | licenseservice | Disabled/Stopped | Monitors and records client access licensing for portions of the operating system (such as IIS, Terminal Server, and File/Print) as well as products that aren't a part of the OS, such as SQL and Exchange Server. If this service is stopped, licensing will be enforced, but will not be monitored. |
Logical Disk Manager | dmserver | Automatic/Started | Detects and monitors new hard disk drives and sends disk volume information to Logical Disk Manager Administrative Service for configuration. If this service is stopped, dynamic disk status and configuration information may become out of date. |
Logical Disk Manager Administrative Service | dmadmin | Manual/Stopped | Configures hard disk drives and volumes. |
Messenger | messenger | Disabled/Stopped | Transmits net send and Alerter service messages between clients and servers. This service is not related to Windows Messenger. |
Microsoft Software Shadow Copy Provider | swprv | Manual/Stopped | Manages software-based volume shadow copies taken by the Volume Shadow Copy service. If this service is stopped, software-based volume shadow copies cannot be managed. |
Net Logon | netlogon | Manual/Stopped | Maintains a secure channel between this computer and the domain controller for authenticating users and services. If this service is stopped, the computer may not authenticate users and services and the domain controller cannot register DNS records. |
NetMeeting Remote Desktop Sharing | mnmsrvc | Disabled/Stopped | Enables an authorized user to access this computer remotely by using NetMeeting over a corporate intranet. If this service is stopped, remote desktop sharing will be unavailable. |
Network Connections | netman | Manual/Started | Manages objects in the Network and Dial-Up Connections folder, in which you can view both local area network and remote connections. If this service is disabled, you will not be able to view local area network and remote connections. |
Network DDE | netdde | Disabled/Stopped | Provides network transport and security for DDE for programs running on the same computer or on different computers. If this service is stopped, DDE transport and security will be unavailable. |
Network DDE DSDM | netddedsdm | Disabled/Stopped | Manages Dynamic Data Exchange (DDE) network shares. If this service is stopped, DDE network shares will be unavailable. |
Network Location Awareness (NLA) | nla | Manual/Started | Collects and stores network configuration and location information, and notifies applications when this information changes. |
NT LM Security Support Provider | ntlmssp | Manual/Stopped | Provides security to RPC programs that use transports other than named pipes. |
Performance Logs and Alerts | sysmonlog | Manual/Stopped | Collects performance data from local or remote computers based on preconfigured schedule parameters, then writes the data to a log or triggers an alert. If this service is stopped, performance information will not be collected. |
Plug and Play | plugplay | Automatic/Started | Enables a computer to recognize and adapt to hardware changes with little or no user input. Stopping or disabling this service will result in system instability. |
Portable Media Serial Number | wmdmpmsn | Manual/Stopped | Retrieves the serial number of any portable media player connected to this computer. If this service is stopped, protected content might not be downloaded to the device. |
Print Spooler | spooler | Automatic/Started | Manages all local and network print queues and controls all printing jobs. If this service is stopped, printing on the local machine will be unavailable. |
Protected Storage | protectedstorage | Automatic/Started | Protects storage of sensitive information, such as private keys, and prevents access by unauthorized services, processes, or users. If this service is stopped, protected storage will be unavailable. |
Remote Access Auto Connection Manager | rasauto | Manual/Stopped | Detects unsuccessful attempts to connect to a remote network or computer and provides alternative methods for connection. If this service is stopped, users will need to manually connect. |
Remote Access Connection Manager | rasman | Manual/Stopped | Manages dial-up and virtual private network (VPN) connections from this computer to the Internet or other remote networks. If this service is stopped, the operating system might not function properly. |
Remote Desktop Help Session Manager | rdsessmgr | Manual/Stopped | Manages and controls Remote Assistance. If this service is stopped, Remote Assistance will be unavailable. |
Remote Procedure Call (RPC) | rpcss | Automatic/Started | Serves as the endpoint mapper and COM Service Control Manager. If this service is stopped or disabled, programs using COM or RPC services will not function properly. |
Remote Procedure Call (RPC) Locator | rpclocator | Manual/Stopped | Enables RPC clients using the RpcNs* family of APIs to locate RPC servers. If this service is stopped or disabled, RPC clients using RpcNs* APIs may be unable to locate servers or fail to start. |
Remote Registry | remoteregistry | Automatic/Started | Enables remote users to modify registry settings on this computer. If this service is stopped, the registry can be modified only by users on the local computer. |
Removable Storage | nlmssvc | Manual/Stopped | Manages and catalogs removable media and operates automated removable media devices. If this service is stopped, programs that are dependent on Removable Storage, such as Backup and Remote Storage, will operate more slowly. |
Resultant Set of Policy Provider | rsopprov | Manual/Stopped | Enables a user to connect to a remote computer, access the Windows Management Instrumentation database for that computer, and either verify the current Group Policy settings made for the computer or check settings before they are applied. If this service is stopped, remote verification will be unavailable. If this service is disabled, any services that explicitly depend on it will fail to start. |
Routing and Remote Access | remoteaccess | Disabled/Stopped | Enables multiprotocol LAN-to-LAN, LAN-to-WAN, VPN, and network address translation (NAT) routing services for clients and servers on this network. |
Secondary Logon | seclogon | Automatic/Started | Lets processes start under alternate credentials. If this service is stopped, this type of logon access will be unavailable. |
Security Accounts Manager | samss | Automatic/Started | The startup of this service signals other services that the Security Accounts Manager (SAM) is ready to accept requests. Disabling this service will prevent other services in the system from being notified when the SAM is ready, which may in turn prevent those services from starting correctly. |
Server | lanmanserver | Automatic/Started | Supports file, print, and named-pipe sharing over the network for this computer. If this service is stopped, these functions will be unavailable. |
Shell Hardware Detection | shellhwdetection | Automatic/Started | Provides notifications for AutoPlay hardware events. |
Smart Card | scardsvr | Manual/Stopped | Manages access to smart cards read by this computer. If this service is stopped, the computer will be unable to read smart cards. |
Special Administration Console Helper | sacsvr | Manual/Stopped | Allows administrators to remotely access a command prompt using Emergency Management Services. |
System Event Notification | sens | Automatic/Started | Monitors system events and notifies subscribers to COM+ Event System of these events. If this service is stopped, COM+ Event System subscribers will not receive system event notifications. |
Task Scheduler | schedule | Automatic/Started | Enables a user to configure and schedule automated tasks on this computer. If this service is stopped, these tasks will not be run at their scheduled times. |
TCP/IP NetBIOS Helper | lmhosts | Automatic/Started | Provides support for the NetBIOS over TCP/IP (NetBT) service and NetBIOS name resolution for clients on the network, therefore enabling users to share files, print, and log on to the network. |
Telephony | tapisrv | Manual/Stopped | Provides Telephony API (TAPI) support for clients using programs that control telephony devices and IP-based voice connections. |
Telnet | tlntsvr | Disabled/Stopped | Enables a remote user to log on to this computer and run programs, and supports various TCP/IP Telnet clients, including UNIX-based and Windows-based computers. |
Terminal Services | termservice | Manual/Started | Allows users to connect interactively to a remote computer. Remote Desktop, Fast User Switching, Remote Assistance, and Terminal Server depend on this service. Stopping or disabling this service may make your computer unreliable. To prevent remote use of this computer, clear the checkboxes on the Remote tab of the System properties control panel item. |
Terminal Services Session Directory | tssdis | Disabled/Stopped | Enables a user connection request to be routed to the appropriate terminal server in a cluster. If this service is stopped, connection requests will be routed to the first available server. |
Themes | themes | Disabled/Stopped | Provides user experience theme management. |
Uninterruptible Power Supply | ups | Manual/Stopped | Manages an uninterruptible power supply (UPS) connected to the computer. |
Upload Manager | uploadmgr | Manual/Stopped | Manages synchronous and asynchronous file transfers between clients and servers on the network. If this service is stopped, synchronous and asynchronous file transfers between clients and servers on the network will not occur. |
Virtual Disk Service | vds | Manual/Stopped | Provides software volume and hardware volume management service. |
Volume Shadow Copy | vss | Manual/Stopped | Manages and implements Volume Shadow Copies used for backup and other purposes. If this service is stopped, shadow copies will be unavailable for backup and the backup may fail. |
WebClient | webclient | Disabled/Stopped | Provides WebDAV integration into the Explorer shell. |
Windows Audio | audiosrv | Automatic/Started | Manages audio devices for Windows-based programs. If this service is stopped, audio devices and effects will not function properly. |
Windows Image Acquisition (WIA) | stisvc | Disabled/Stopped | Provides image acquisition services for scanners and cameras. |
Windows Installer | msiserver | Manual/Stopped | Adds, modifies, and removes applications provided as a Windows Installer (*.msi) package. |
Windows Management Instrumentation | winmgmt | Automatic/Started | Provides a common interface and object model to access management information about operating system, devices, applications, and services. If this service is stopped, most Windows-based software will not function properly. |
Windows Management Instrumentation Driver Extensions | wmi | Manual/Stopped | Monitors all drivers and event trace providers that are configured to publish Windows Management Instrumentation (WMI) or event trace information. |
Windows Time | w32time | Automatic/Started | Maintains date and time synchronization on all clients and servers in the network. If this service is stopped, date and time synchronization will be unavailable. |
WinHTTP Web Proxy Auto-Discovery Service | winhttpautoproxysvc | Manual/Stopped | Implements the Web Proxy Auto-Discovery (WPAD) protocol for Windows HTTP Services (WinHTTP). WPAD is a protocol to enable an HTTP client to automatically discover a proxy configuration. If this service is stopped or disabled, the WPAD protocol will be executed within the HTTP client's process instead of an external service process; there would be no loss of functionality as a result. |
Wireless Configuration | wzcsvc | Automatic/Started | Enables automatic configuration for IEEE 802.11 adapters. If this service is stopped, automatic configuration will be unavailable. |
WMI Performance Adapter | wmiapsrv | Manual/Stopped | Provides performance library information from WMI providers to clients on the network. This service runs only when Performance Data Helper is activated. |
Workstation | lanmanworkstation | Automatic/Started | Creates and maintains client network connections to remote servers. If this service is stopped, these connections will be unavailable . |