How to Kill Messenger Ads (Messenger Spam) in Windows XP?
When you are connected to the Internet, a new window may open on your computer screen containing an advertisement. The windows are labeled Messenger Service in the title bar. However, these messages, which are sometimes called "messenger spam," are not related to Windows Messenger, MSN® Messenger or such instant messaging services.
These advertisements are sent via the Messenger Service, which is designed for use by system administrators in Windows server-client networks. System administrators use the messenger service to send messages that notify you of conditions on or give status about your network. However, some advertisers have started using this service to send their information via the Internet.
Disabling your messenger service will disable the messenger popup advertisement.
To disble messenger service in Windows XP (and Windows 2000, 2003):
1) Click Start, click Control Panel, click Performance and Maintenance, click Administrative Tools, and then double-click Services. You must be logged on as an administrator or a member of the Administrators group in order to complete this procedure.
2) Select the Messenger. On the Action menu, click Stop to temporarily stop.
3) Right-click the Messenger, and then click Properties. On the General tab, in the Startup type box, click Disabled.