diff --git a/profiles/DerGeret/Windows/Setup.ps1 b/profiles/DerGeret/Windows/Setup.ps1
index 7b8f01e9..d0015fff 100644
--- a/profiles/DerGeret/Windows/Setup.ps1
+++ b/profiles/DerGeret/Windows/Setup.ps1
@@ -9,6 +9,14 @@ function Initialize-SetupConfig() {
     );
 
     New-Module {
+        <#
+        .SYNOPSIS
+            Gets the XML element describing the installation partition ID.
+        #>
+        Get-InstallationPartition {
+            $setupComponent.SelectSingleNode("./ua:ImageInstall/ua:OSImage/ua:InstallTo/ua:PartitionID", $namespace)
+        }
+
         <#
         .SYNOPSIS
             Increases the ID of all partitions in the specified range by 1.
@@ -19,13 +27,16 @@ function Initialize-SetupConfig() {
                 [System.Nullable[int]]$To = $null,
                 [int]$By = 1
             )
-    
+
+            # Update installation partition ID if necessary
+            $installationPartition = Get-InstallationPartition;
             $installPartitionID = [int]$installationPartition.InnerText;
     
             if (($installPartitionID -ge $From) -and (($null -eq $To) -or ($installPartitionID -lt $To))) {
                 $installationPartition.InnerText = "$($installPartitionID + $By)";
             }
     
+            # Update IDs of all partition creations
             foreach ($partition in $partitionCreations) {
                 $orderNode = $partition.SelectSingleNode("./ua:Order", $namespace);
                 $order = [int]$orderNode.InnerText;
@@ -40,6 +51,7 @@ function Initialize-SetupConfig() {
                 }
             }
     
+            # Update IDs of all partition modifications
             foreach ($partition in $partitionModifications) {
                 $partitionNode = $partition.SelectSingleNode("./ua:PartitionID", $namespace);
                 $partitionID = [int]$partitionNode.InnerText;
@@ -105,7 +117,6 @@ function Initialize-SetupConfig() {
         $namespace);
 
     $diskConfig = $setupComponent.SelectSingleNode("./ua:DiskConfiguration/ua:Disk", $namespace);
-    $installationPartition = $setupComponent.SelectSingleNode("./ua:ImageInstall/ua:OSImage/ua:InstallTo/ua:PartitionID", $namespace);
 
     $partitionCreationContainer = $diskConfig.SelectSingleNode("./ua:CreatePartitions", $namespace);
     $partitionCreations = $partitionCreationContainer.SelectNodes("./ua:CreatePartition", $namespace);