Services are programs that run when the computer starts, they then continue to run because they are part of system functionality.

Many start-ups and are not necessary, they take the memory and CPU time. Disable these services frees up system resources and gives more power to your computer.

I advise you to look at the list of them and to disable those you do not use. You can always reactivate a service if you need it.

Here's how you find an icon Services in the Administrative Tools.

Click the Start button.

Select Run.

Enter services.msc in the dialog box and click ok.

When the service window is loaded, you can disable services that are not necessary.

To disable the serial number portable media for example.
Select service in the list.
Select Properties using the right click.

When the Properties window is open, select Startup Type to using the menu Automatic, Manual or Disabled. A manual start if it is necessary to operate the system if it is disabled, it will not start.

Click OK, the next system startup, it will not be started.
Services available by default
Remote Registry

Allows users to remotely edit the registry settings on your computer.If this service is stopped, the registry can be modified by the users of that computer.

For security reasons, it is best to disable this service.
Acquisition d'image Windows (WIA) Windows Image Acquisition (WIA)

Provides image acquisition for scanners and cameras. If you have this type of device, leave this service to Manual or Automatic.

Messenger
Sends and receives messages alerting services between clients and servers. This service is not related to Windows Messenger.If this service is stopped, messages alerts will not be sent. If this service is disabled, any services that depend on will not start. Put it in manual mode if you're not connected to a network. If you are connected to a network must be put in automatic mode.

Help and Support
Allows the Help and Support application to run on this computer. If this service is stopped, Help and Support feature will not be available. If it is off, all services explicitly depend on this service will not start. Put it in manual mode.

Remote Procedure Call (RPC)
Mapper provides the exit point FER and various services. Leave it in automatic mode.

COM + System Application
Manages the configuration and monitoring of the basic COM + (Component Object Model). If the service is stopped, most basic components COM + will not work properly. If this service is disabled, any services that explicitly depend on will not start. Put it in automatic mode.

TCP / IP NetBIOS
Enables support for NetBIOS over a TCP / IP (NetBT) and NetBIOS name resolution. Leave it in automatic mode.

Windows Audio
Manage audio devices for Windows-based programs. If this service is stopped, peripherals and audio effects will not work properly. If this service is disabled, any services that explicitly depend not start. Leave it in automatic mode if your computer is multimedia.

Warning
Inform users and computers of administrative alerts selected. If this service is stopped, programs that use administrative alerts will not do. If this service is disabled, any services that depend on will not start.Put it in manual mode.

Smart card
Manages access to smart cards read by this computer. If this service is stopped, this computer can read more of smartcards. If this service is disabled, any services that explicitly depend not start. Put it in Off mode.

Map performance WMI
Provides information on the performance library from suppliers HiPerf WMI. Put it in manual mode.

Volume Shadow
Manages and implements the shadow volumes for backups and other uses. If this service is stopped, the shadow will not be available for backup and backup fail. If this service is disabled, any services that explicitly depend not start. Put it in manual mode.

Link Tracking
Maintains links between NTFS files within a computer or multiple computers in a network domain. Leave this service mode.

DHCP Client
Manages network configuration by registering and updating IP addresses and DNS names. Leave it in automatic mode if you use the Internet.

DNS Client
Fixes and caches DNS names for this computer. If this service is stopped, the computer can not resolve DNS names and find domain controllers Active Directory. If this service is disabled, any services that depend on will not start. Leave it in automatic mode.

Compatibility with Fast User Switching
Provides a management system for applications that require assistance in an environment of multiple users. You can put it in manual mode and set this feature in Control Panel: User Accounts / Change the way users log on or off. Mettre ce service en mode Manuel. Put it in manual mode.

Wireless Zero Configuration
Provides automatic configuration of 802.11 cards.Put it in manual mode if you do not use a wireless connection.

Secondary connection
Lets start processes under other identifying information.If this service is stopped, this opening session will be unavailable. If this service is disabled, any services that explicitly depend not start. The Run option as the menu that appears after right-clicking on an executable will not have available. Leave this service mode.

Network Connections
Supports objects in the Network Connections folder and remote access, where you can view both the local area network connections and remote connections. Put it in manual mode.

Network DDE
Provides network transport and security for Dynamic Data Exchange for programs running on the same computer or different computers. If this service is stopped, transport and security for Dynamic Data Exchange will be unavailable.If this service is disabled, any services that explicitly depend not start. Mettre ce service en mode Manuel. Put it in manual mode.

Detection equipment kernel
Leave it in automatic mode.

Distributed Transaction Coordinator
Coordinates transactions that involve multiple resource managers, such as databases, message queues net file systems. If this service is stopped, these transactions will not occur. If it is off, the start of any service that depends explicitly fail. Put it in manual mode.

Network DDE DSDM
Manages Dynamic Data Exchange shared network. If this service is stopped, the dynamic exchange of shared data network will no longer be available. If this service is disabled, any services that explicitly depend not start. If you do not Manager Album which can cut or copy information you can share with other users on a network, you can put it on manual. A set as DDE network. Leave this service mode.

Protected
Protection for sensitive data, such as private keys, to prevent access by services, processes or unauthorized users. Laisser ce service en mode Automatique. Leave it in automatic mode.

Explorer computer
Maintains a list of computers on the network and supplies this list to computers designated as browsers. If this service is stopped, the list will not be placed or maintained. If this service is disabled, any services that depend on will not start.Leave it in automatic mode, put it in manual if you're not connected to a network.

Extensions driver WMI
Provides information management system to and from pilots. Put it in manual mode.

Provider support NT LM Security
Secure programs RPC (remote procedure calls) that use transport other than named pipes. Put it in manual mode.

Application Management
Provides software installation such as Assign, Publish, and Remove. Put it in manual mode.

Security Accounts Manager
Stores security information for local user accounts. Leave it in automatic mode.
Distant Connection Manager automatically Remote Access
Creates a connection to a remote network whenever a program references a name or a DNS or NetBIOS remote. Put it in manual mode.

Connection Manager Remote Access
Create a network connection. Put it in manual mode.

LDM
Detects and analyzes new hard disk drives and sends the information to disk volume for administrative manager for the logical drive configuration. If this service is stopped, the status of dynamic disks and configuration information may become obsolete. If this service is disabled, any services that explicitly depend not start. Leave this service mode.

Manager Album
Active Manager Album to store and share information with computers remotely. If the service is stopped, Manager Album will not share information with computers remotely. If this service is disabled, any services that explicitly depend not start. Put it in manual mode.

Session manager for help with Remote Desktop
Manages and controls Remote Assistance. If this service is stopped, Remote Assistance is not available. Check the Dependencies tab before stopping this service. Put it in manual mode.

Download Manager
Manages the file transfers synchronous and asynchronous between clients and servers on the network. If this service is stopped, file transfers synchronous and asynchronous between clients and servers will not be possible. Use to send information to Microsoft on your drivers. If it is off, all services explicitly depend on this service will not start. Put it in manual mode.

HID Input Service
If the advanced features buttons on your keyboard or your scanner no longer work, turn this service. Leave this service mode.

Windows clock
Conserve synchronize the date and time on all clients and servers on the network. If this service is stopped, synchronizing the date and time will be unavailable.If this service is disabled, any services that explicitly depend not start, I see Time tab I nternet in the Date and Time properties. Leave it in automatic mode.

Host Device Universal Plug and Play
Offer support for universal peripheral host Plug and Play. Leave this service mode.

Windows Management Infrastructure
Provides a common interface and object model to access information management operating system, devices, applications and services. If this service is stopped, most Windows-based software will not work properly. If this service is disabled, any services that explicitly depend not start. Leave it in automatic mode.

Event Log
Enables the event messages issued by programs running under Windows and components to be displayed in Event Viewer. This service can not be stopped. Leave it in automatic mode.

Performance Logs and Alerts
Collects performance data of local or remote computers based on parameters planned pre configured, then writes the data in a log or triggers an alert. If this service is stopped, performance information will not be collected. If this service is disabled, any services that explicitly depend not start. Leave this service mode.

Locator Remote Procedure Call (RPC)
Manages the database name service PRC. Leave this service mode.

Automatic Updates
Active downloading and installing Windows updates criticism. If the service is disabled, the operating system can not be updated. Leave Automatic mode service in order to meet the Windows updates

MS Shadow Copy Software Provider
Manages software copies shadow volumes created by the shadow volumes. If this service is stopped, copies of software shadow copies can not be managed. If the service is disabled, any services that depend on will not start. This service is useful if you are connected to a Windows server. NET. Leave this service mode.

NLA (Network Location Awareness)
Collects and stores configuration information and network location, and notify applications when this information changes. Necessary service on the computer that acts as a gateway if you use the Internet connection sharing. Leave this service mode if you do not share your Internet connection.

Event notification system
Scans the system event such as Windows logons and events on the network and food. Warns subscribers COM + Event System of these events.Leave it in automatic mode.

Serial number of portable media
Get the serial number of digital connected to your computer. If you have a digital camera, leave it in automatic mode or turn it into Manual.

NVIDIA Driver Helper Service
Leave it in automatic mode.

UPS
Manages an inverter connected to the computer. Leave it in automatic mode if you use a UPS or put it into Manual or Disabled.

Network Logon
Supports direct authentication events logon account for computers in a domain.Leave this service mode on a particular network.

Connection Firewall Internet (ICF) / Internet Connection Sharing (ICS)
Provides translation of network addresses, addresses, the name resolution and / or services intrusion prevention network for a small business or home network. This service is required to use the firewall and Internet Connection Sharing built into Windows XP. Leave this service mode if you do not use Connection Sharing, or put it in Automatic.

Remote Desktop Sharing NetMeeting
Allows people authorized to access your Windows desktop using NetMeeting. Leave this service mode or better Off.

Task Scheduler
Allow the user to configure and schedule automated tasks on this computer. If this service is stopped, these tasks will not be implemented on time. If this service is disabled, any services that explicitly depend not start. Leave this service mode or Off if you do not use Task Scheduler.

Plug and Play
Allows the computer to recognize and adapt the hardware changes with little if any user interaction. Stopping or disabling this service causes system instability. Leave it in automatic mode.

Support for smart cards
Provides support for smart card readers non-Plug and Play inherited used by this computer. If this service is stopped, this computer will not drive inherited. If this service is disabled, any services that explicitly depend not start. Leave this service mode.

QoS RSVP
Provides signaling network functionality and installation traffic control, Local programs recognizing applets and QoS control. Leave this service mode.

Routing and Remote Access
Provides businesses with services routing in LAN environments or extended. Disable this service.

Server
Supports file sharing, printing and named pipes over the network for that computer. If this service is stopped, these functions are not available. If this service is disabled, any services that depend on will not start. Leave it in automatic mode.

Burning COM service IMAPI CD
Manages to burn CDs via the serial interface IMAPI (Image Mastering Applications Programming Interface). If this service is stopped, this computer will no longer record CDs. If this service is disabled, any services that depend on will not be able to start. Disable the service will avoid problems with other programs engravings not built into Windows XP.
Service administration of LDM
Configure the hard disk drives and volumes. The service does that for the process configurations and then stops. Let this service mode.

SSDP Discovery Service
Enables the discovery of devices Universal Plug and Play on your home network. Leave this service mode.

Service Gateway Application Layer
Provides support for third party plugins protocols for Internet Connection Sharing and Internet firewall. Leave this service mode unless you use Connection Sharing.

Service serial number of portable media players
Service used to identify mobile devices through their serial numbers. Put it in Off mode.

Service Error Reporting
Enable error reporting for services and applications running on non-standard environments.
Disable this service unless you want to send an error report to Microsoft. See also properties of the system.


Service System Restore
Perform System Restore.To stop this service, disable System Restore tab in the System Restore properties of My Computer. You can put it in manual mode also see in the System Properties.
Transfer Service background
Uses idle network bandwidth for data transfer. The Windows Update site where Microsoft publishes updates to Windows and some functions of MSN Explorer and MSN Messenger use this service to resume downloads after a disconnection. It is not necessary to leave the service started at all times. Leave this service mode.

Indexing Service
Constructed an index of content and properties of files on local and remote computers, providing faster access to files through a flexible query language. Leave this service mode unless you spend your time searching for information on your PC. Attention resource consuming if it is activated!

Cryptographic Services
Provides three management services: the database catalog, which confirms the signatures of Windows files; the root protected, which adds and removes certificates of certification authority root approved and key service, which provides assistance in the inclusion of this computer for certificates. If this service is stopped, these management services will not work properly. If this service is disabled, any services that explicitly depend not start. Is used to confirm the signing of Windows, this service is required to install the updates to Windows. For added security, leave it in automatic mode.

IPSEC Services
Manages IP security policy and starts the management pilot IP Security and ISAKMP / Oakley (IKE). Leave it in automatic mode on a LAN, put it in manual if you're not on a LAN.

Server Terminal Services
Allows multiple users to simultaneously connect to a computer while displaying offices and applications on remote computers.Contains the underlying Remote Desktop (including Remote Desktop for administrators), Fast User Switching, Remote Assistance and Terminal Services. Disable the service or put it in manual.

Print spooler
Load files into memory for printing later. If you do not have a local printer or network or if you use a little, you can put it in manual mode.

Work Station
Creates and maintains client network connections to remote servers. If this service is stopped, these connections will not be available.If this service is disabled, any services that depend on will not start. Leave it in automatic mode.

Removable Storage
Manages removable media, readers and libraries. If you have an Iomega, for example, always leave it in automatic mode or Manual.

System COM + Event
Supports the notification service system event (MEANING, System Event Notification Service), which provides automatic distribution of events to components COM (Component Object Model) subscribers. If the service is stopped, SENS will close and can provide information opening and closing session. If this service is disabled, the start of any service that depends explicitly fail, you can put it in manual mode.

Phones
Provides support for Telephony API (TAPI) for the programs that control devices for telephony, voice connections based on IP, on the local computer via the local network, on the server where the service works. Leave it in automatic mode.

Telnet
Allows a remote user to connect to the system and implement programs and supports various Telnet clients TCP / IP including UNIX and Windows. If this service is stopped, the user may not have remote access to programs.If this service is disabled, any services that explicitly depend on will not start. Désactivez ce service. Disable this service.

Topics
Provides a management system theme of the user experience ... Put this service Manual or Disabled if you do not like fluorescent colors and if you use the classical style.

WebClient
Allows a program running under Windows to create, edit and access to Internet files. If this service is stopped, these functions are not available. If this service is disabled, any services that explicitly depend not start. Leave it in automatic mode or Manual setting.

Windows Installer
Installs, repairs and removes software according to the instructions contained in the files. MSI. Put it in manual mode.