这都是什么服务啊？

Application Layer Gateway Service
 Automatic Updates
 Background Intelligent Transfer Service
 COM+ Event System
 Computer Browser
 Cryptographic Services
 DCOM Server Process Launcher
 DHCP Client
 Distributed Link Tracking Client
 DNS Client
 Event Log
 Fast User Switching Compatibility
 IPSEC Services
 Logical Disk Manager
 Network Connections
 Network Location Awareness (NLA)
 NVIDIA Display Driver Service
 Plug and Play
 Print Spooler
 Protected Storage
 Remote Access Connection Manager
 Remote Procedure Call (RPC)
 Secondary Logon
 Security Accounts Manager
 Security Center
 Server
 Shell Hardware Detection
 SSDP Discovery Service
 Symantec AntiVirus
 Symantec AntiVirus Definition Watcher
 Symantec Event Manager
 Symantec Settings Manager
 System Event Notification
 Task Scheduler
 TCP/IP NetBIOS Helper
 Telephony
 Terminal Services
 Themes
 WebClient
 Windows Audio
 Windows Firewall/Internet Connection Sharing (ICS)
 Windows Management Instrumentation
 Windows Time
 Wireless Zero Configuration
 Workstation