Added usb creatir windows binary

BUILD_INSTRUCTIONS.md

-# MBetter USB Creator - Build Instructions
-
-## Prerequisites
-
-### Linux:
-```bash
-# Install Python and Qt dependencies
-sudo apt update
-sudo apt install python3 python3-pip python3-pyqt6 genisoimage
-
-# Install Python dependencies
-pip3 install -r requirements.txt
-```
-
-### Windows:
-```cmd
-# Install Python 3.9+ from python.org
-# Install dependencies
-pip install -r requirements.txt
-
-# Install 7-zip (required for ISO extraction)
-# Download from: https://www.7-zip.org/
-```
-
-## Building Standalone Executable
-
-### Automatic Build:
-```bash
-# Run the build script (installs deps and builds)
-python3 build_usb_creator.py
-```
-
-### Manual Build:
-```bash
-# Install dependencies
-pip3 install -r requirements.txt
-
-# Build executable
-pyinstaller --clean usb_creator.spec
-```
-
-## Running
-
-### From Source:
-```bash
-# Linux (requires sudo)
-sudo python3 usb_creator_gui.py
-
-# Windows (run as Administrator)
-python usb_creator_gui.py
-```
-
-### Standalone Executable:
-```bash
-# Linux
-sudo ./dist/MBetterUSBCreator
-
-# Windows
-# Right-click → Run as Administrator
-dist\MBetterUSBCreator.exe
-```
-
-## Features
-
-- [OK] Cross-platform (Linux/Windows)
-- [OK] ISO file selection and validation
-- [OK] USB device auto-detection
-- [OK] Optional root password configuration
-- [OK] Optional OpenVPN config integration
-- [OK] Progress indicators and logging
-- [OK] Safe USB device selection (prevents system disk selection)
-- [OK] Standalone executable (no Python installation required)
-
-## Usage
-
-1. **Select ISO**: Browse for your MBetter ISO file
-2. **Choose USB**: Select target USB device from dropdown
-3. **Configure Password** (Optional): Set custom root password for installed system
-4. **Add VPN Config** (Optional): Include OpenVPN configuration files
-5. **Create USB**: Click to start the USB creation process
-
-The created USB will:
-- Boot to live environment with autologin
-- Automatically start installation process
-- Use your custom root password (if set)
-- Include VPN configuration in installed system (if provided)
-- Work completely offline

usb_creator.spec

@@ -51,12 +51,12 @@ exe = EXE(
     target_arch=None,
     codesign_identity=None,
     entitlements_file=None,
-    icon='icon.ico' if is_windows else None,
+    icon='icon.ico' if is_windows and os.path.exists('icon.ico') else None,
 )
 
 # Create app bundle on macOS
 if sys.platform == 'darwin':
     app = BUNDLE(exe,
                  name='MBetterUSBCreator.app',
-                 icon='icon.icns',
+                 icon='icon.icns' if os.path.exists('icon.icns') else None,
                  bundle_identifier='com.mbetter.usbcreator')