You're talking about the 'Messenger Service Message from WebPopUp' right???
If so:
Click Start
Click on Run
Then type: cmd.exe into the little box and click okay.
Then:
type: net send 127.0.0.1 Hi, am I vulnerable to a net send messages? then press "enter" on your keyboard.
If you recieved a popup Messenger advertisement window with "your" typed out message, you need to disable the service.
Disabling the Messenger Service:
1-
Click Start and then click Run.
2-
In the run box type: services.msc
3-
The Services window opens. Maximize the window so you can see the services items better, Locate and Double Click on the word "Messenger"
4-
Click the "Stop" button and the service will run the stop process.
5-
Stop Service Process.
6-
Choose "Disabled" for the startup type.
7-
Click on the Apply button to set the service state.
then click "ok"
8-
The Messenger Service now shows "Disabled" and you can close the window to exit back to your desktop.
9-
Restart Your Computer and enjoy "free of messenger popup spam" while you surf!!!