diff --git a/func/Module_mainwindow.py b/func/Module_mainwindow.py
index 056972e..05d1b76 100644
--- a/func/Module_mainwindow.py
+++ b/func/Module_mainwindow.py
@@ -277,9 +277,11 @@ class MainWindow(QMainWindow, Ui_Signal_Label):
     def seek_sampID(self, path):
         if not Path(path).exists():
             PublicFunc.msgbox_output(self, Constants.MAINWINDOW_ROOT_PATH_NOT_EXIST, Constants.MSGBOX_TYPE_ERROR)
+            self.ui.comboBox_sampID.clear()
             return
 
         sub_folders = [item.name for item in Path(path).iterdir() if item.is_dir()]
+        self.ui.comboBox_sampID.clear()
         self.ui.comboBox_sampID.addItems(sub_folders)
 
     def check_root_path(self):
diff --git a/ui/MainWindow/MainWindow_menu.py b/ui/MainWindow/MainWindow_menu.py
index 5f7f1ff..104c18a 100644
--- a/ui/MainWindow/MainWindow_menu.py
+++ b/ui/MainWindow/MainWindow_menu.py
@@ -50,6 +50,7 @@ class Ui_Signal_Label(object):
 
         self.plainTextEdit_root_path = QPlainTextEdit(self.centralwidget)
         self.plainTextEdit_root_path.setObjectName(u"plainTextEdit_root_path")
+        self.plainTextEdit_root_path.setEnabled(False)
 
         self.verticalLayout_3.addWidget(self.plainTextEdit_root_path)
 
diff --git a/ui/MainWindow/MainWindow_menu.ui b/ui/MainWindow/MainWindow_menu.ui
index 6189829..5445f16 100644
--- a/ui/MainWindow/MainWindow_menu.ui
+++ b/ui/MainWindow/MainWindow_menu.ui
@@ -40,7 +40,11 @@
            </widget>
           </item>
           <item>
-           <widget class="QPlainTextEdit" name="plainTextEdit_root_path"/>
+           <widget class="QPlainTextEdit" name="plainTextEdit_root_path">
+            <property name="enabled">
+             <bool>false</bool>
+            </property>
+           </widget>
           </item>
          </layout>
         </item>