Messenger Spam Block
In order for you to be able to easily stop messenger spam pop-ups from appearing on your computer, we developed a small free utility: Messenger Spam Filter. Windows, by default, leaves the messaging service active upon installation. Once deactivated, the messenger spam can no longer invade your... Messenger Spam Filter allows temporarily deactivating or permanently disabling the Messenger service, Messenger Spam Filter temporarily deactivates or permanently disables the Messenger service, protecting you from annoying Messenger pop-up windows.
http://www.spamliquidator.com/files/messenger-spam-block.exe - 248Kb - Download - Screenshot

Pop up Blocker
Pop Up Blocker has four types of pop-up blocking: 100 percent pop-up blocking, a block list, a block list with keywords, and a limit on the number of open windows. Pop up Blocker also blocks Flash Ads, Background sounds, Inline videos, JAVA Applets and Animated gif files. ... This program is packed with advanced privacy-protection technologies, which prevent your home page from being reset, protect your proxy settings, provide a sound effect upon closing pop-ups, disable auto suggesting, and block messenger-spam pop-up ads.
http://www.synergeticsoft.com/files/pb6.0.5.exe - 534Kb - Download - Screenshot

IP Messenger Spam Blocker
Simple one-click to complete protection against Messenger pop-up ads! IP Messenger Spam Blocker prevents IP messages from appearing on your machine. One click and your system is automatically protected. Direct IP messaging is the newest form of advertising spam. ... Block all IP Message Spam - Download IP Messenger Spam Blocker Invisible Browsing will also protect you by blocking ActiveX controls which can harbor malicious code such as viruses and invasive code such as JavaScript. ... These ads are unlike email spam or simple pop-up window ads that you might experience while browsing the...
http://www.amplusnet.com/setups/ipspamblocker.exe - 441Kb - Download - Screenshot

Pop up Blocker Pro
Pop up Blocker Pro is an aggressive pop-up blocker. The pop-up blocker has 4 types of pop-ups blocking: 100% pop-ups blocking, Pop-ups Block list, Pop-ups Block list with keywords, Limit windows opened. This is one program packed with advanced Privacy Protection Technologies (Prevent your home... With Pop up Blocker Pro you can surf the Web with complete peace-of-mind, knowing that Pop up Blocker Pro protects you from unwanted data becoming permanently hidden in your PC, without the possibility to recover it.
http://www.synergeticsoft.com/files/PBpro.exe - 657Kb - Download - Screenshot

Popup Killer
Popup Killer is used for stopping all annoying pop-up ads windows when you surf the internet. It also blocks Windows Messenger in Windows XP/2000/NT which interfere with your program running. It is easy-use tool without any configuration. It runs automatically when Windows starts up each time,... Block Messenger popup spams for Windows XP/2000/NT. ... The main features include: Block unsolicited pop-up ads. ... Robust and never make IE crash or frozen. ... Easy to use without need any configuration.
http://www.008soft.com/products/PopupKiller.exe - 376Kb - Download - Screenshot

Pop-Up Stopper Professional
The only privacy product to block pop-up windows and clean tracking files in every browser on every Internet connection. No matter how you surf, you are protected. Pop-Up Stopper Professional blocks, or quickly closes, pop-up and pop-under ads in ALL browsers, including FireFox, AOL, MSN,... This product even blocks those new, annoying Messenger Service Spam windows. ... Preserve bandwidth by stopping pop-up windows before they load! ... Play one of many fun sounds when a pop-up window is blocked.
http://www.popupstopper.net/downloads/PopUpStopperProfessional.exe - 1,000Kb - Download - Screenshot

Spamcc Pro
Spamcc Pro is a powerful, safe spam filter. It can help you block spam and pick up useful e-mail from your inbox. Spamcc Pro automatically and simultaneously checks and retrieves your e-mail messages from multi accounts, such as POP3, IMAP, Hotmail, MSN, AOL, Yahoo and Gmail. ... You can train it to learn what you consider spam and what you consider legitimate e-mail. ... Other filter features include Friends List (import from Outlook, Outlook Express, and MSN Messenger), Blacklist, Country Blocking and customizable filters.
http://www.spamcc.com/download/ProSetup.exe - 2Mb - Download - Screenshot

IEJet-Popup Killer and Ad Stopper
It is a compact and efficent plug-in of Internet Explorer. It has the following features: Block the annoying popup ad/ads windows;Block Messenger Spam(which is getting popular today);Block Macromedia Flash;BOSS KEY to minimize/close all IE windows within 1 second;Alternative ways to disable... It makes you surf on net more comfortable and smoothly, TRY IT OUT TODAY!!!
http://iemate.retsinasoftware.com/iemate.exe - 358Kb - Download - Screenshot

Message Killer
Have you ever had an advertisement pop-up out of nowhere on your desktop? This message was sent to your computer through a built in feature that Microsoft included in your copy of Windows 2000, NT, or XP. These types of spam messages are worse than unwanted e-mail since you dont even need to... Message Killer will block each and every pop-up ad sent through Microsoft's Messenger Service. ... With Message Killer, you can block these unwanted messages forever with the click of a button! ... No longer do you have sit and wait as your computer freezes or crashes due to one of these messages.
http://www.voytech.net/messagekiller.exe - 157Kb - Download - Screenshot

AbsoluteShield Internet Eraser Lite
AbsoluteShield Internet Eraser Lite contains a pop-up blocker and a privacy protector. It protects your privacy by cleaning up all the tracks of your Internet and computer activities. The tool is integrated with Internet Explorer and it can erase the browser history, cookies, typed URLs, recent... The pop-up blocker also blocks messenger service pop-up spam. ... The tool also has an integrated pop-up blocker which will block the unwanted pop-up and ad windows in Internet Explorer when you surf the Internet.
http://download.internet-track-eraser.com/download/eraser_lite.exe - 2Mb - Download - Screenshot