Windows Messenger service
（重定向自Net Send）
![WinPopup, shown in the background, first appeared in Windows for Workgroups, together with several other network applications.](/Images/godic/202501/29/Windows_for_Workgroups4747.png")
![](/Images/godic/202501/29/Winpopup-win3114747.png")
![Example of Messenger service spam from 2007.](/Images/godic/202501/29/Netspam4747.gif")
Messenger service is a network-based system notification Windows service by Microsoft that was included in some earlier versions of Microsoft Windows.
This legacy technology, although it has a similar name, is not related in any way to the later, Internet-based Microsoft Messenger service for instant messaging or to Windows Messenger and Windows Live Messenger (formerly named MSN Messenger) client software.