diff --git a/adb_controller.py b/adb_controller.py
index f712ffe..b8be9af 100644
--- a/adb_controller.py
+++ b/adb_controller.py
@@ -13,21 +13,21 @@
 os.environ["ADBUTILS_ADB_PATH"] = str(adb_bin_path)
 ADB_BIN_PATH = str(adb_bin_path)
 
-def try_connect_device(addr: str, timeout: float=3.0) -> adbutils.AdbClient | None:
-    client = adbutils.AdbClient()
+def start_adb_server() -> bool:
+    command = f"{ADB_BIN_PATH} start-server"
     try:
-        output = client.connect(addr, timeout)
-        assert len(client.device_list()) > 0
-        LOGGER.write(LogType.Server, output)
-    except adbutils.AdbTimeout as e:
-        client.disconnect(addr)
-        LOGGER.write(LogType.Error, "Connect timeout: " + str(e))
-        return None
+        process = subprocess.Popen(
+            command,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            text=True,
+        )
+        process.wait()
+        return True
     except Exception as e:
-        client.disconnect(addr)
-        LOGGER.write(LogType.Error, "Connect failed: " + str(e))
-        return None
-    return client
+        process.terminate()
+        LOGGER.write(LogType.Error, "ADB server failed to start: " + str(e))
+        return False
 
 def try_pairing(addr: str, pairing_code: str) -> bool:
     command = f"{ADB_BIN_PATH} pair {addr} {pairing_code}"
@@ -38,12 +38,31 @@ def try_pairing(addr: str, pairing_code: str) -> bool:
             stderr=subprocess.PIPE,
             text=True,
         )
-        process.wait()
+        process.wait(3)
+        _, stderr = process.communicate()
+        if stderr: raise Exception(stderr)
         return True
     except Exception as e:
+        process.terminate()
         LOGGER.write(LogType.Error, "ADB failed to pair: " + str(e))
         return False
 
+def try_connect_device(addr: str, timeout: float=3.0) -> adbutils.AdbClient | None:
+    client = adbutils.AdbClient()
+    try:
+        output = client.connect(addr, timeout)
+        assert len(client.device_list()) > 0
+        LOGGER.write(LogType.Server, output)
+    except adbutils.AdbTimeout as e:
+        client.disconnect(addr)
+        LOGGER.write(LogType.Error, "Connect timeout: " + str(e))
+        return None
+    except Exception as e:
+        client.disconnect(addr)
+        LOGGER.write(LogType.Error, "Connect failed: " + str(e))
+        return None
+    return client
+
 def get_display_size(adb_client: adbutils.AdbClient) -> tuple[int, int]:
     device = adb_client.device_list()[0]
     output = str(device.shell("dumpsys window displays"))
diff --git a/main.py b/main.py
index 6e58cfa..a8bf8e8 100644
--- a/main.py
+++ b/main.py
@@ -2,6 +2,7 @@
 import sys
 import adbutils
 
+from adb_controller import start_adb_server
 from multiprocessing import freeze_support
 from input.controller import main_loop
 from server import ADBConnectionError, InvalidDummyByteException, server_process_factory, try_connect_server
@@ -50,6 +51,7 @@ def close_notification_resolver(errno: Exception | None):
 if __name__ == "__main__":
     freeze_support()
 
+    start_adb_server()
     open_connecting_window()
 
     server_process = server_process_factory()
diff --git a/ui/connecting_window.py b/ui/connecting_window.py
index 2ad9710..0a676dc 100644
--- a/ui/connecting_window.py
+++ b/ui/connecting_window.py
@@ -22,14 +22,15 @@ def pair_callback():
 
         addr = addr_entry.get().strip()
         pairing_code = pairing_code_entry.get().strip()
-        if not is_valid_ip(addr):
+        if not is_valid_ip_port(addr):
             error_label.configure(text=I18N(["Invalid pairing address!", "配对地址无效！"]))
             return
         ret = try_pairing(addr, pairing_code)
-        if ret == False:
+        if not ret:
             error_label.configure(text=I18N(["Pairing Failed!", "配对失败！"]))
             return
         device_ip = get_ip_from_ip_port(addr)
+        connecting_addr_entry.delete(0, ctk.END)
         connecting_addr_entry.insert(0, device_ip)
         tabview.set(I18N(["Connecting", "连接"]))
         connecting_window.deiconify()
@@ -131,7 +132,7 @@ def direct_connect(addr: str):
         nonlocal process_data_queue
         if not is_valid_ip(addr):
             process_data_queue.put(
-                ProcessError(I18N(["Invalid connecting address!", "配对地址无效！"])))
+                ProcessError(I18N(["Invalid connecting address!", "连接地址无效！"])))
             return
         ret = try_connect_device(addr)
         if ret is not None: