Article ID: 330904 - View products that this article applies to.
This article was previously published under Q330904
You may receive an Internet advertisement in a Messenger service window. The advertisement contains text that is similar to the following text:These messages are also known as "messenger spam."
This issue may occur if you receive a net send message from someone who is using the Messenger service in Windows. The Messenger service is a Windows service that transmits net send messages and messages that are sent through the Alerter service between client computers and servers. For example, network administrators use Messenger service to send administrative alerts to network users. Windows and other software programs can also use the Messenger service. For example, Windows may use it to inform you when a print job is completed or when you lose power to your computer and switch to an uninterruptible power supply (UPS). Your antivirus program may use the Messenger service to send you notifications. The Messenger service is not related to your Web browser, e-mail program, Windows Messenger, or MSN Messenger. This issue may occur if the following conditions exist:
To resolve this issue, install or turn on a firewall that blocks inbound NetBIOS and UDP broadcast traffic. The method that you use to resolve this issue depends on your operating system and how you connect to the Internet. The following sections provide examples of several different configurations and possible methods of resolution.
You connect to the Internet directlyIf you use a single computer that is connected to the Internet directly (by using a cable modem, a DSL modem, or a dial-up modem, for example), install a firewall and block inbound NetBIOS and UDPbroadcast traffic on your computer.
You are running Windows XPIf you are running Windows XP and connect to the Internet directly (by using a cable modem, a DSL modem, or a dial-up modem, for example), install Windows XP Service Pack 1 (SP1) and turn on Internet Connection Firewall (ICF). By default, the installation of Windows XP SP1 permits Internet Connection Firewall (ICF) to block all incoming traffic (unicast, multicast, and broadcast). By default, if you have installed Windows XP Service Pack 2 (SP2), Windows Firewall (WF) is turned on.
For additional information about this change in ICF blocking behavior in Windows XP SP1, click the following article number to view the article in the Microsoft Knowledge Base:
329928For additional information about how to obtain Windows XP SP1, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/329928/ )ICF now blocks insolicited inbound unicast, multicast, and broadcast traffic
322389For additional information about how to turn on ICF, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322389/ )How to obtain the latest Windows XP service pack
(http://support.microsoft.com/kb/283673/ )How to turn on or turn off the Internet firewall in Windows XP
You are running Windows 2000If you are running Windows 2000 and connect to the Internet directly (by using a cable modem, a DSL modem, or a dial-up modem, for example), obtain and install a third-party firewall product that blocks inbound NetBIOS and UDP broadcast traffic.
You connect to the Internet through a small network that you manageIf your network uses connection sharing to provide Internet access to multiple computers, install or enable the firewall only on the shared Internet connection.
You are running Windows XP with Internet Connection SharingIf you use Internet Connection Sharing in Windows XP to provide Internet access to multiple computers, install Windows XP SP1 on the Internet Connection Sharing host computer and turn on ICF only on the Internet Connection Sharing host computer.
You are running Windows with a hardware Internet Connection Sharing deviceIf you use a router or other hardware device to provide Internet access to multiple computers, configure the connection sharing device to block inbound NetBIOS and UDP broadcast traffic. Contact the manufacturer of your third-party connection sharing device for more information.
You connect to the Internet though a network that you do not manageIf you connect to the Internet by using a corporate network, or if your Internet service provider (ISP) uses a firewall, ask the network administrator to configure the firewall to block inbound NetBIOS and UDP traffic. Contact your network administrator or ISP for more information.
To work around this issue, turn off the Messenger service. To do this, follow these steps:
The Messenger service uses UDP ports 135, 137, and 138; TCP ports 135, 139, and 445; and an ephemeral (that is, short-lived) port number greater than 1024.
Firewalls help prevent net send messages and help protect your computer from other malicious attacks over the Internet. These attacks can be designed to perform the following tasks:
Article ID: 330904 - Last Review: April 12, 2013 - Revision: 11.0
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