diff --git a/EduNetworkBuilder/ListBoxWindow.cs b/EduNetworkBuilder/ListBoxWindow.cs
index 4fe2ca0..831cfb0 100644
--- a/EduNetworkBuilder/ListBoxWindow.cs
+++ b/EduNetworkBuilder/ListBoxWindow.cs
@@ -162,6 +162,8 @@ namespace EduNetworkBuilder
                 newCB = AddCheckBox(count++, Untested);
                 newCB.Checked = true; //start with this one checked
 
+                this.ControlBox = false; //remove the X at the top corner that gives us problems
+
                 panelCheckboxes.ResumeLayout();
                 btnOK.Text = NB.Translate("_Load");
                 btnAdd.Text = NB.Translate("_Cancel");