diff --git a/src/main/java/tg/cyberlabmanager/controller/LabController.java b/src/main/java/tg/cyberlabmanager/controller/LabController.java
index bdc61aa..ff01885 100644
--- a/src/main/java/tg/cyberlabmanager/controller/LabController.java
+++ b/src/main/java/tg/cyberlabmanager/controller/LabController.java
@@ -867,7 +867,7 @@ private void refreshVmTable(List<VirtualMachine> vms) {
             };
 
             javafx.scene.layout.HBox row = VmTableView.createVmRow(
-                    vm.getName(), shortUuid, statusText, "");
+                    vm.getName(), shortUuid, statusText);
 
             row.setOnMouseClicked(e -> onVmRowClicked(vm));
             vmListContainer.getChildren().add(row);
diff --git a/src/main/java/tg/cyberlabmanager/pdf/PdfExporter.java b/src/main/java/tg/cyberlabmanager/pdf/PdfExporter.java
index faa1898..acc3d25 100644
--- a/src/main/java/tg/cyberlabmanager/pdf/PdfExporter.java
+++ b/src/main/java/tg/cyberlabmanager/pdf/PdfExporter.java
@@ -91,6 +91,7 @@ public void exportLabToPdf(Lab lab,
 
         document = new PDDocument();
         pageNum  = 0;
+        cs       = null;
         newPage();
 
         // ── Bandeau principal ─────────────────────────────────────────────────
diff --git a/src/main/java/tg/cyberlabmanager/ui/VmTableView.java b/src/main/java/tg/cyberlabmanager/ui/VmTableView.java
index ce05837..df468eb 100644
--- a/src/main/java/tg/cyberlabmanager/ui/VmTableView.java
+++ b/src/main/java/tg/cyberlabmanager/ui/VmTableView.java
@@ -10,16 +10,15 @@
  */
 public class VmTableView {
 
-    /**
-     * Cree la ligne HBox pour afficher une Machine Virtuelle dans le tableau.
-     * 
-     * @param name   Nom de la VM
-     * @param uuid   UUID court
-     * @param status Statut en texte clair
-     * @param os     OS de la machine
-     * @return La ligne d'affichage configurée
-     */
-    public static HBox createVmRow(String name, String uuid, String status, String os) {
+     /**
+      * Cree la ligne HBox pour afficher une Machine Virtuelle dans le tableau.
+      * 
+      * @param name   Nom de la VM
+      * @param uuid   UUID court
+      * @param status Statut en texte clair
+      * @return La ligne d'affichage configurée
+      */
+    public static HBox createVmRow(String name, String uuid, String status) {
         HBox row = new HBox();
         row.getStyleClass().add("vm-row-selected");
         row.setAlignment(Pos.CENTER_LEFT);
@@ -44,10 +43,7 @@ public static HBox createVmRow(String name, String uuid, String status, String o
         };
         lStatus.getStyleClass().addAll("status-badge", statusCss);
 
-        Label lOs = new Label(os);
-        lOs.getStyleClass().add("vm-os");
-
-        row.getChildren().addAll(lName, lUuid, lStatus, lOs);
+        row.getChildren().addAll(lName, lUuid, lStatus);
         return row;
     }
 }
diff --git a/src/main/resources/tg/cyberlabmanager/ui/cyberlab.css b/src/main/resources/tg/cyberlabmanager/ui/cyberlab.css
index 967ba7c..db828c5 100644
--- a/src/main/resources/tg/cyberlabmanager/ui/cyberlab.css
+++ b/src/main/resources/tg/cyberlabmanager/ui/cyberlab.css
@@ -283,11 +283,6 @@
     -fx-font-size: 12;
 }
 
-.vm-os {
-    -fx-text-fill: #D4D4D4;
-    -fx-font-size: 12;
-}
-
 /* Badge statut VM */
 .status-badge {
     -fx-font-family: "Inter", "Segoe UI", Arial, sans-serif;
diff --git a/src/main/resources/tg/cyberlabmanager/ui/main-view.fxml b/src/main/resources/tg/cyberlabmanager/ui/main-view.fxml
index 25544af..bffe3f1 100644
--- a/src/main/resources/tg/cyberlabmanager/ui/main-view.fxml
+++ b/src/main/resources/tg/cyberlabmanager/ui/main-view.fxml
@@ -135,7 +135,6 @@
                     <Label text="VM NAME" prefWidth="240" styleClass="table-header-label"/>
                     <Label text="UUID"    prefWidth="210" styleClass="table-header-label"/>
                     <Label text="STATUS"  prefWidth="150" styleClass="table-header-label"/>
-                    <Label text="OS"                      styleClass="table-header-label"/>
                 </HBox>
 
                 <!-- Liste VMs -->