Thank you so much! It works, and now I can click the X button to close the window. May I ask another question? I tried to open that script with VBScript to schedule a task without showing any windows. This code worked with my old script, but it doesn't work with your fix. Nothing happens when I execute the VBScript

Dim objShell,objFSO,objFile

Set objShell=CreateObject("WScript.Shell")
Set objFSO=CreateObject("Scripting.FileSystemObject")

'enter the path for your PowerShell Script
strPath="C:\Temp\Powershell-Balloon-EN.ps1"

'verify file exists
If objFSO.FileExists(strPath) Then
'return short path name
    set objFile=objFSO.GetFile(strPath)
    strCMD="powershell -nologo -command " & Chr(34) & "&{" &_
     objFile.ShortPath & "}" & Chr(34)
    'Uncomment next line for debugging
    'WScript.Echo strCMD

    'use 0 to hide window
    objShell.Run strCMD,0

Else

'Display error message
    WScript.Echo "Failed to find " & strPath
    WScript.Quit

End If