diff --git a/README.md b/README.md
index d475588..f9d12fd 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,21 @@
-# RunDecrypt
+# Self Extracting Runner (PyInstaller)
+
+This project builds a Windows executable that:
+
+1. Contains a bundled `app.zip`
+2. Extracts it to a temporary folder at runtime
+3. Runs `app.exe` from inside the extracted files
+4. Cleans up the temporary folder after execution
+
+---
+
+## Requirements
+
+- Python 3.8+
+- PyInstaller
+
+Install PyInstaller:
+
+```bash
+pip install pyinstaller
 
-A simple Project in python which extracts and decrypts your project (base64) and runs it.
\ No newline at end of file
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..b6075a2
--- /dev/null
+++ b/main.py
@@ -0,0 +1,60 @@
+import os
+import sys
+import zipfile
+import tempfile
+import subprocess
+import shutil
+
+def resource_path(relative_path: str) -> str:
+    """
+    Get absolute path to resource, works for dev and for PyInstaller bundle.
+    """
+    if hasattr(sys, "_MEIPASS"):
+        return os.path.join(sys._MEIPASS, relative_path)
+    return os.path.join(os.path.abspath("."), relative_path)
+
+def extract_and_run():
+    zip_name = "app.zip"
+    exe_name = "app.exe"
+
+    zip_path = resource_path(zip_name)
+
+    if not os.path.isfile(zip_path):
+        print("Payload app.zip not found!")
+        return 1
+
+    temp_dir = tempfile.mkdtemp(prefix="self_extract_")
+
+    try:
+        with zipfile.ZipFile(zip_path, "r") as z:
+            z.extractall(temp_dir)
+
+        exe_path = os.path.join(temp_dir, exe_name)
+
+        if not os.path.isfile(exe_path):
+            print("app.exe not found inside extracted payload!")
+            return 2
+
+        # Run the extracted executable
+        process = subprocess.Popen(
+            [exe_path],
+            cwd=temp_dir,
+            shell=False
+        )
+
+        process.wait()
+        return process.returncode
+
+    finally:
+        # Cleanup after execution
+        try:
+            shutil.rmtree(temp_dir, ignore_errors=True)
+        except Exception:
+            pass
+
+def main():
+    code = extract_and_run()
+    sys.exit(code if code is not None else 0)
+
+if __name__ == "__main__":
+    main()