1. Click Start, and then click Control Panel (or point to Settings, and then click Control Panel).
2. Double-click Administrative Tools.
3. Double-click Services.
4. Double-click Messenger.
5. In the Startup type list, click Disabled.
6 Click Stop, and then click OK.
Note If the Messenger service is stopped, messages from the Alerter service (notifications from your antivirus software, for example) are not transmitted. If the Messenger service is turned off, any services that explicitly depend on the Messenger service do not start, and an error message is logged in the system event log. Therefore, Microsoft recommends that you install a firewall and configure it to block NetBIOS and RPC traffic instead of turning off the Messenger service.