diff --git a/src/time_tracker/core/session_manager.py b/src/time_tracker/core/session_manager.py
index 7f9b9c4..44e6c19 100644
--- a/src/time_tracker/core/session_manager.py
+++ b/src/time_tracker/core/session_manager.py
@@ -3,6 +3,7 @@ import os
 from datetime import datetime
 from typing import Dict, List, Optional
 from pathlib import Path
+import time
 
 
 class SessionManager:
@@ -11,17 +12,26 @@ class SessionManager:
         self.tasks_directory.mkdir(exist_ok=True)
         self.current_session: Optional[Dict] = None
         self.session_dirty = False
+        # Keep track of last session creation time to prevent duplicates
+        self._last_session_time = 0
 
     def create_session(self, task_id: str, project_id: str) -> Dict:
         """
         Create a new work session.
         """
-        session_id = datetime.now().strftime("%Y%m%dT%H%M%S")
+        # Ensure unique session ID even if called rapidly
+        current_time = time.time()
+        if current_time <= self._last_session_time:
+            current_time = self._last_session_time + 0.001  # Add small increment
+
+        self._last_session_time = current_time
+        session_id = datetime.fromtimestamp(current_time).strftime("%Y%m%dT%H%M%S%f")[:-3]  # Include milliseconds
+
         session = {
             "session_id": session_id,
             "task_id": task_id,
             "project_id": project_id,
-            "started_at": datetime.now().isoformat(),
+            "started_at": datetime.fromtimestamp(current_time).isoformat(),
             "duration_seconds": 0,
             "window_details": {},
             "distractions": [],
diff --git a/src/time_tracker/platform/windows.py b/src/time_tracker/platform/windows.py
index f6f2842..e228b96 100644
--- a/src/time_tracker/platform/windows.py
+++ b/src/time_tracker/platform/windows.py
@@ -37,11 +37,19 @@ def register_session_listener(callback: Callable[[str], None]) -> None:
         except:
             pass  # Already registered
 
+        # Corrected CreateWindow call with all required parameters
         hwnd = win32gui.CreateWindow(
-            wndclass.lpszClassName,
-            "Session Watcher",
-            0, 0, 0, 0, 0,
-            0, hinst, None
+            wndclass.lpszClassName,    # lpClassName
+            "Session Watcher",         # lpWindowName
+            0,                         # dwStyle
+            0,                         # x
+            0,                         # y
+            0,                         # nWidth
+            0,                         # nHeight
+            0,                         # hWndParent
+            0,                         # hMenu
+            hinst,                     # hInstance
+            None                       # lParam
         )
 
         # Register for session notifications