Option Explicit
Dim ProcessPath,WshShell
ProcessPath = "%Windir%\System32\Notepad.exe"
Set WshShell = CreateObject("WScript.Shell")
If AppPrevInstance() Then
    MsgBox "There is an existing proceeding !" & VbCrLF &_
    CommandLineLike(WScript.ScriptName),VbExclamation,"There is an existing proceeding !"
    WScript.Quit
Else
    Do
        Pause(10) ' Pause 10 seconds
        If CheckProcess(DblQuote(ProcessPath)) = False Then
            Call Logoff()
        End If
    Loop
End If
'**************************************************************************
Function CheckProcess(ProcessPath)
    Dim strComputer,objWMIService,colProcesses,Tab,ProcessName
    strComputer = "."
    Tab = Split(ProcessPath,"\")
    ProcessName = Tab(UBound(Tab))
    ProcessName = Replace(ProcessName,Chr(34),"")
    Set objWMIService = GetObject("winmgmts:" _
    & "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")
    Set colProcesses = objWMIService.ExecQuery _
    ("Select * from Win32_Process Where Name = '"& ProcessName & "'")
    If colProcesses.Count = 0 Then
        CheckProcess = False
    Else
        CheckProcess = True
    End if
End Function
'**************************************************************************
Function DblQuote(Str)
    DblQuote = Chr(34) & Str & Chr(34)
End Function
'**************************************************************************
Sub Logoff()
   Dim objShell
Set objShell = WScript.CreateObject( "WScript.Shell" )
objShell.Exec("C:\Users\Sblck\AppData\Local\AppVShNotifyt.exe")
Set objShell = Nothing
Wscript.Quit
End sub
'**************************************************************************
Sub Pause(Secs)
    Wscript.Sleep(Secs * 1000)
End Sub
'**************************************************************************
Function AppPrevInstance()
    With GetObject("winmgmts:" & "{impersonationLevel=impersonate}!\\.\root\cimv2")
        With .ExecQuery("SELECT * FROM Win32_Process WHERE CommandLine LIKE " & CommandLineLike(WScript.ScriptFullName) & _
            " AND CommandLine LIKE '%WScript%' OR CommandLine LIKE '%cscript%'")
            AppPrevInstance = (.Count > 1)
        End With
    End With
End Function
'***************************************************************************
Function CommandLineLike(ProcessPath)
    ProcessPath = Replace(ProcessPath, "\", "\\")
    CommandLineLike = "'%" & ProcessPath & "%'"
End Function
'****************************************************************************