diff --git a/run.vbs b/run.vbs
index bd5afb5..3e25376 100644
--- a/run.vbs
+++ b/run.vbs
@@ -1,5 +1,37 @@
 Set objShell = Wscript.CreateObject ("Wscript.shell")
-do 
+dim islocked
+
+
+    call checklock
+
+
+
+'=================================
+'Functions
+'=================================
+
+function checklock
+    Dim computer : computer = "."
+
+    If WScript.Arguments.Count = 1 Then
+        computer = WScript.Arguments(0)
+    End If
+
+    If locked(computer) Then
+        Wscript.Quit
+    Else
+        do 
 WScript.Sleep(600000)
 objShell.Run "python C:\users\%username%\usercheck\check.py"
-loop 
\ No newline at end of file
+loop 
+        wscript.sleep 3000 'for debugging - allow time to enter lock screen
+    End If      
+end function
+
+
+Function locked(computer)
+    Dim wmi : Set wmi = GetObject("winmgmts://" & computer & "/root/cimv2")
+    Dim lockapp_count : lockapp_count = wmi.ExecQuery ("SELECT * FROM Win32_Process WHERE Name = 'lockapp.exe'").Count
+    Dim explorer_count : explorer_count = wmi.ExecQuery ("SELECT * FROM Win32_Process WHERE Name = 'explorer.exe'").Count
+    locked = (lockapp_count >= explorer_count)
+End Function