Пример защиты от повторного запуска скрипта

Func _Mutex($handle, $flag = 0)
        Local $ERROR_ALREADY_EXISTS = 183, $dll = DllCall("kernel32.dll", "int", "CreateMutex", "int", 0, "long", 1, "str", StringReplace($handle, "\", "")), $err = DllCall("kernel32.dll", "int", "GetLastError")
        If $err[0] = $ERROR_ALREADY_EXISTS and $flag = 0 Then Exit
        SetError($err[0])
        Return $dll[0]
EndFunc

Func _Mutex($semaphore)
    Local $ERROR_ALREADY_EXISTS = 183
    DllCall("kernel32.dll", "int", "CreateSemaphore", "int", 0, "long", 1, "long", 1, "str", $semaphore)
    Local $lastError = DllCall("kernel32.dll", "int", "GetLastError")
    If $lastError[0] = $ERROR_ALREADY_EXISTS Then Exit -1
EndFunc

Func _AlreadyRunning()
    If ProcessExists(@Scriptname) Then
        $list = ProcessList()
            for $i = 1 to $list[0][0]
            If $list[$i][0] = @ScriptName And $list[$i][1] <> @AutoItPID Then 
                Exit
            EndIf
            Next
    EndIf
EndFunc

_SingleTon()

If WinExists('MyGUI_#idZdex') Then
	; Скрипт уже запущен
	Exit
EndIf

GUICreate('MyGUI_#idZdex')

...

#Include <Misc.au3>

AutoItSetOption("TrayAutoPause", 0)

if _Singleton("test",1) = 0 Then 
    TrayTip ("AutoIt", "Арчилинк уже запущен!", 1)
    sleep(2000)
    TrayTip("clears any tray tip","",0)
    Exit
EndIf

; НАЧАЛО
; Защита от повторного запуска

 $TITLE1="Старт"
 $TEXT1="zZzZzZz"

 ONLYONE()

 ; ...

 $GUI=GuiCreate($TITLE1,400,300)
 GUICtrlCreateLabel($TEXT1,0,0,0,0)

 ; ...

 Func ONLYONE()
  $AW=WinList()
  for $COUNTER=1 to $AW[0][0]
   if ($AW[$COUNTER][0]=$TITLE1) and WinExists($AW[$COUNTER][1],$TEXT1) then Exit
  next
 EndFunc

; КОНЕЦ