diff --git a/qui/styles/qubes-widgets-base.css b/qui/styles/qubes-widgets-base.css
index d895b1a5..e45a2861 100644
--- a/qui/styles/qubes-widgets-base.css
+++ b/qui/styles/qubes-widgets-base.css
@@ -151,3 +151,12 @@ radiobutton radio {
     border: none;
     background: none;
 }
+
+tooltip {
+    text-shadow: none;
+    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
+}
+
+tooltip * {
+    color: @text-color;
+}
diff --git a/qui/updater/intro_page.py b/qui/updater/intro_page.py
index e3dbcd0d..21b780de 100644
--- a/qui/updater/intro_page.py
+++ b/qui/updater/intro_page.py
@@ -168,7 +168,9 @@ def refresh_update_list(self, update_if_stale):
             if row.vm.name == "dom0":
                 continue
             row.updates_available = bool(row.vm.name in to_update)
-            row.selected = bool(row.vm.name in to_update)
+            row.selected = bool(
+                row.vm.name in to_update
+            ) and not row.vm.features.get("prohibit-start", False)
 
     def get_vms_to_update(self) -> ListWrapper:
         """Returns list of vms selected to be updated"""