Useless System Services That Can Be Turned Off

Disable system services for maximum performance :
There are system services that you can disable to free up the system's load. To access the interface that permits you to make changes to system's services, type services.msc and the command prompt.
This is a list of services that are *usually* useless and can be safely disabled.

• Alerter
• Application Layer Gateway Service,
• Application Management
• Automatic Updates
• Background Intelligent Transfer
• Clipbook
• Distributed Link Tracking Client
• Distributed Transaction Coordinater
• Error Reporting Service
• Fast User Switching Compatibility
• IMAPI CD-Burning
• Indexing Service
• IPSEC Services
• Messenger
• Net Logon
• Net Meeting
• Remote Desktop Sharing
• Network DDE
• Network DDE DSDM
• Portable Media Serial Number
• Remote Desktop Help Session Manager
• Remote Registry
• Secondary Logon
• Smartcard
• SSDP Discovery Service
• Uninterruptible Power Supply
• Universal Plug and Play Device Host
• Upload Manager
• Webclient
• Wireless Zero Configuration
• WMI Performance Adaptor

NOTE: Make sure you don't need them since some applications you're using could depend on them. If you make any application to fail by disabling any of the services, go back and enable it again.