Net Send

To work around this problem, change the Startup type of the Messenger service to Automatic, and then start the Messenger service.

To do this, follow these steps:

1. Open Windows Explorer.
2. In the left pane, right-click My Computer, and then click Manage.
3. In the Computer Management window, expand Services and Applications in the left pane, and then click Services.
4. In the right pane, double-click Messenger.
5. In the Messenger Properties (Local Computer) dialog box, click the General tab.
6. On the General tab, select Automatic from the Startup type list, and then click Apply.
7. Under Service status, click Start, and then click OK.

Copy to  a file and save as .bat ext.

 

@echo off

:A

Cls

echo MESSENGER

set /p n=User:

set /p m=Message:

net send %n% %m%

Pause

Goto A