diff --git a/src/playbook/Configuration/atlas/start.yml b/src/playbook/Configuration/atlas/start.yml
index 3c6ae4ae51..a493d5b030 100644
--- a/src/playbook/Configuration/atlas/start.yml
+++ b/src/playbook/Configuration/atlas/start.yml
@@ -6,19 +6,27 @@ actions:
   - !powerShell:
     wait: true
     command: >-
-      $modulesPath = """$([Environment]::GetFolderPath('Windows'))\AtlasModules""";
+      function Add-ToPath ([array]$Paths) {
+            $machine = [System.EnvironmentVariableTarget]::Machine;
+            $seperator = [IO.Path]::PathSeparator;
+            
+            $Paths | ForEach-Object {
+                  if (!(Test-Path $_ -PathType Container)) {
+                        Write-Error """Path '$_' doesn't exist as a container."""
+                  }
+            };
 
-      function AddToVar($env, $value) {
-            $a = [IO.Path]::PathSeparator;
-            $b = [System.EnvironmentVariableTarget]::Machine;
-            $c = [Environment]::GetEnvironmentVariables($b);
+            $newPath = @();
+            $newPath += [Environment]::GetEnvironmentVariable('PATH', $machine) -split $seperator;
+            if ($newPath.Count -eq 0) { Write-Warning 'The PATH variable is currently empty.' };
+            $newPath += $Paths;
+            $newPath = $newPath | Where-Object { $_ } | Select-Object -Unique;
 
-            [Environment]::SetEnvironmentVariable($env,
-            ("""$($c.'Path');$value""" -replace ';',"""$a"""),
-            $b);
+            [Environment]::SetEnvironmentVariable('PATH', """$($newPath -join $seperator)""", $machine);
       };
 
-      AddToVar 'Path' """$modulesPath;$modulesPath\Apps;$modulesPath\Other;$modulesPath\Tools;$modulesPath\Scripts""";
+      $modulesPath = """$([Environment]::GetFolderPath('Windows'))\AtlasModules""";
+      Add-ToPath """$modulesPath""", """$modulesPath\Apps""", """$modulesPath\Other""", """$modulesPath\Tools""", """$modulesPath\Scripts""";
 
   ################ NO LOCAL BUILD ################