diff --git a/main.py b/main.py
index 9d4a3e0..4b87309 100644
--- a/main.py
+++ b/main.py
@@ -8,8 +8,14 @@ optional multi-user server synchronization.
 """
 
 import sys
+import multiprocessing
 from pathlib import Path
 
+# CRITICAL: Must be called before anything else on Windows with PyInstaller
+# This prevents the infinite spawning loop when the frozen executable runs
+if sys.platform == 'win32':
+    multiprocessing.freeze_support()
+
 # Add project root to Python path
 project_root = Path(__file__).parent
 sys.path.insert(0, str(project_root))