diff --git a/scripts/Windows/OS/Install.ps1 b/scripts/Windows/OS/Install.ps1
index 207bb3bc..19e947ba 100644
--- a/scripts/Windows/OS/Install.ps1
+++ b/scripts/Windows/OS/Install.ps1
@@ -29,7 +29,7 @@ function Start-WindowsInstallation([Context] $context) {
 
     while (-not $finished) {
         switch ($context.GetStage()) {
-            { $_ -in $null,$initialConfigStage } {
+            { (-not $_) -or ($_ -eq $initialConfigStage) } {
                 $context.SetStage($initialConfigStage);
 
                 if ((Get-Command Initialize-Configuration -ErrorAction SilentlyContinue)) {
diff --git a/scripts/Windows/OS/User/Add.ps1 b/scripts/Windows/OS/User/Add.ps1
index 6a4deb0c..ab93873d 100644
--- a/scripts/Windows/OS/User/Add.ps1
+++ b/scripts/Windows/OS/User/Add.ps1
@@ -25,7 +25,7 @@ function New-PersonalUser([Context] $context, [string] $userName)
     }
 
     switch (Get-UserStage) {
-        { $_ -in $null,$creationStage } {
+        { (-not $_) -or ($_ -eq $creationStage) } {
             Set-UserStage $creationStage;
 
             if (-not (Get-LocalUser $userName -ErrorAction SilentlyContinue)) {