Here's how to uninstall Windows Messenger.  Note the separate instructions for with and without "Service Pack 1" installed.

Uninstall Windows Messenger WITHOUT Service Pack 1 Installed: 

• "Start" (menu)
• "Run..."
• Type: RunDll32 advpack.dll,LaunchINFSection %windir%\INF\msmsgs.inf,BLC.Remove

Restart your computer for good measure.

Repeat above procedure to ensure that it is uninstalled.

Uninstall Windows Messenger WITH Service Pack 1 Installed:

• "Start" (menu)
• "control panel"
• "Add or Remove Programs"
• "Add/Remove Windows Components"
• Disable "Windows Messenger"

Restart your computer for good measure.

Also See:

• Windows XP Setup Tweaks & Tips

About the Author:  I am Matthew Doucette of Xona Games, an award-winning, indie game studio I run with my twin brother. We concentrate on nostalgic game concepts with modern-day gameplay and intensity. Our company, our games, and our technology have all won prestigious awards and received worldwide press. Our games have ranked from #1 in Canada to #1 in Japan, as well as become #1 best sellers in multiple countries. Read about our story and our blog.