diff --git a/liquidctl_worker.py b/liquidctl_worker.py
index 5646883..05df6a2 100644
--- a/liquidctl_worker.py
+++ b/liquidctl_worker.py
@@ -13,20 +13,25 @@ class LiquidCTL_Init():
             #print(f'{dev.description}')
             device_name = dev.description
             init_status = dev.initialize()
-
             if init_status:
                 for key, value, unit in init_status:
                     #print(f'- {key}: {value} {unit}')
                     device_fwVers = value
 
+    def TestConnectionState(self):
+        if self.device_name != None:
+            return False
+        else:
+            return True
+
     def Update(self):
         with self.dev.connect():
-                status = self.dev.get_status()
-                for key, value, unit in status:
-                    #print(f'- {key}: {value} {unit}')
-                    if key == "Liquid temperature":
-                        self.device_temp = value
-                    elif key == "Fan speed":
-                        self.device_fanSpeed = value
-                    elif key == "Pump speed":
-                        self.device_pumpSpeed = value
\ No newline at end of file
+            status = self.dev.get_status()
+            for key, value, unit in status:
+                #print(f'- {key}: {value} {unit}')
+                if key == "Liquid temperature":
+                    self.device_temp = value
+                elif key == "Fan speed":
+                    self.device_fanSpeed = value
+                elif key == "Pump speed":
+                    self.device_pumpSpeed = value
\ No newline at end of file
diff --git a/main.pyw b/main.pyw
index b25c80b..99dd6a3 100644
--- a/main.pyw
+++ b/main.pyw
@@ -1,16 +1,17 @@
 import sys
 import qdarktheme
 import win32mica
-import liquidctl_worker
 import resources
 from PySide6.QtWidgets import QApplication, QMainWindow, QWidget, QVBoxLayout, QLabel, QProgressBar, QGroupBox
 from PySide6.QtCore import Qt, QTimer, QThreadPool
 from PySide6.QtGui import QFont, QIcon
+from liquidctl_worker import LiquidCTL_Init
+from messagehandler import MessageHandler
 
 class MainWindow(QMainWindow):
     def __init__(self):
         super(MainWindow, self).__init__()
-        self.setWindowTitle("LiquidGUI (v.1.0.0.1)")
+        self.setWindowTitle("LiquidGUI (v.1.0.1.2)")
         self.setFixedSize(450, 300)
         self.setWindowFlags(Qt.WindowType.Dialog)
         widget = QWidget(self)
@@ -56,7 +57,6 @@ class MainWindow(QMainWindow):
         self.timer.timeout.connect(self.update_widgets)
         self.timer.start()
 
-
     def update_widgets(self):
         self.lbl_device_name.setText(lctl_worker.device_name)
         self.prg_temp.setValue(lctl_worker.device_temp)
@@ -66,11 +66,16 @@ class MainWindow(QMainWindow):
             self.lbl_fwVers.setText(f"Firmware: v{lctl_worker.device_fwVers}")
         
 app = QApplication(sys.argv)
-
 icon = QIcon(":/icons/LiquidGUI.ico")
 app.setWindowIcon(icon)
 
-lctl_worker = liquidctl_worker.LiquidCTL_Init()
+messagehandler = MessageHandler()
+
+lctl_worker = LiquidCTL_Init()
+# Show error and quit app if no devices are found
+if lctl_worker.TestConnectionState() == True:
+    messagehandler.ShowNoDevicesFoundError()
+    sys.exit(1)
 
 window = MainWindow()
 window.setWindowIcon(icon)
diff --git a/messagehandler.py b/messagehandler.py
new file mode 100644
index 0000000..d5f1fc1
--- /dev/null
+++ b/messagehandler.py
@@ -0,0 +1,10 @@
+from PySide6.QtWidgets import QMessageBox
+
+class MessageHandler():
+    def ShowNoDevicesFoundError(self):
+        msg = QMessageBox()
+        msg.setWindowTitle("LiquidGUI Error")
+        msg.setText("No suitable devices could be detected. Please ensure you have a cooler \
+                   both compatible with LiquidCTL, and connected to the system.")
+        msg.setIcon(QMessageBox.Icon.Warning)
+        msg.exec()
\ No newline at end of file