Windows services that can be disabled

There are plenty of services that can be safely disabled, to free some memory and decrease the load on the system.
Some of them can be disabled if you are not a member of a domain, or if you don't use a specific service.

• Distributed Link Tracking Client
  Maintains links with NTFS files within your computer or across a domain. For example, you could make a file on "Computer A." You then create a "short cut" or "link" to that file on "Computer B." If you would move the file on Computer A to a different location, this service would tell Computer B to update its information to allow uninterrupted connectivity.
  
  
• Error Reporting Service
  Calls home to Microsoft when application errors occur.
  
  
• Indexing Service
  This service always has been a major resource hog.
  
  
• Messenger
  This service provides the ability to send messages between clients and servers. This service has nothing to do with MSN Messenger. Sometimes it used to send spam.
  
  
• Net Logon
  Used for logging onto a Domain Controller. This service is not required on a standalone system, or for a "home" network.
  
  
• NetMeeting Remote Desktop Sharing
  Enables a user to access your computer using NetMeeting.
  
  
• Network DDE
  Provides network transport and security for Dynamic Data Exchange (DDE) for programs running on the same computer or on different computers. (Just a crap)
  
  
• Network DDE DSDM
  Another useless service.
  
  
• Performance Logs and Alerts
  Collect performance data on a schedule and send the information to a log or trigger an alert. It will be usefull if you need to monitor computer performance 24/7
  
  
• Remote Desktop Help Session Manager
  Manages and controls Remote Assistance. If you are like everyone don't use Remote assistance, then disable it.
  
  
• Secondary Logon
  Enables starting processes under alternate credentials. If you don't need "Run as" feature then disable it.
  
  
• Server
  Used for file and print sharing from your computer or Message Queuing. For security purposes, you may disable this service if you do not require local printers and files shared across your network. You still can access remote share folders.
  
  
• Smart Card
  Supports the use of a Smart Card for local or network computer authentication.
  
  
• Uninterruptible Power Supply
  If you don't have a UPS protecting your computer and connected to the computer serial port to shutdown the system, then you don't need it.
  
  
• Wireless Zero Configuration
  Provides automatic configuration for wireless network devices. If you don't have a wireless network adapter in the computer, then you don't need it.