This script will open a message box several times having some message of ur choice.

rem ---------------------------------
rem Spam With VBScript Msgboxes
echo Do>>msgbox.vbs
echo x=msgbox("Your computer is infected with a virus!",0+48,"Infected") >>msgbox.vbs
echo Loop>>msgbox.vbs
start "" "msgbox.vbs"
start "" "msgbox.vbs"
start "" "msgbox.vbs"
start "" "msgbox.vbs"
start "" "msgbox.vbs"
start "" "msgbox.vbs"

you can change Green colored message in above code as per ur choice.


[Note: Be careful in using these scripts, i will not be responsible if you damage your system.]