diff --git a/DEPLOYMENT.md b/DEPLOYMENT.md
new file mode 100644
index 0000000..5c64aa5
--- /dev/null
+++ b/DEPLOYMENT.md
@@ -0,0 +1,88 @@
+# Label Printer - Portable Deployment Guide
+
+## Deployment Structure
+
+The app is now **fully self-contained** with SumatraPDF embedded inside:
+
+```
+LabelPrinter/
+├── LabelPrinter.exe          # Main application (includes SumatraPDF inside)
+├── pdf_backup/               # Auto-created: PDF backups
+└── logs/                     # Auto-created: Print logs
+```
+
+**No visible folders!** SumatraPDF is bundled inside LabelPrinter.exe and extracted to a temporary location at runtime.
+
+## Setup Instructions
+
+### 1. Download SumatraPDF (For Building Only)
+
+**This step is only needed when building the app.** SumatraPDF will be embedded inside the executable.
+
+```powershell
+# PowerShell command to download SumatraPDF
+powershell -ExecutionPolicy Bypass -File setup_sumatra.ps1
+```
+
+This downloads SumatraPDF portable (~5 MB) to the `SumatraPDF` folder.
+
+### 2. Build the Application
+
+```powershell
+.\build_windows.ps1
+```
+
+The build script will:
+- Check for SumatraPDF
+- Bundle it inside the executable
+- Create `dist\LabelPrinter.exe` (~80 MB including all dependencies)
+
+### 3. Deploy
+
+**Simply copy `LabelPrinter.exe` to any Windows machine!**
+
+```
+📁 Deployment (any folder)
+└── LabelPrinter.exe  ← Just this one file!
+```
+
+- No installation needed
+- No additional files or folders
+- Double-click to run
+- Works on any Windows 10/11 machine
+
+## Features
+
+- ✅ **Single Executable** - Everything bundled in one .exe file (~80 MB)
+- ✅ **Fully Portable** - No installation needed, no external dependencies
+- ✅ **Silent Printing** - No PDF viewer windows pop up
+- ✅ **Network Printers** - Supports printers from print servers (e.g. `\\server\printer`)
+- ✅ **PDF Backup** - All labels saved to `pdf_backup/` folder
+- ✅ **Print Logging** - CSV logs in `logs/` folder
+- ✅ **SumatraPDF Hidden** - Embedded inside, not visible to users
+
+## Printer Name Display
+
+Network printer names (e.g. `\\filesibiusb05\ZDesigner_ZQ630`) are automatically shortened to 20 characters in the dropdown for better display. The full printer name is used for actual printing.
+
+## Troubleshooting
+
+### Printing Not Working
+
+1. **Check Printer Connection**: Verify printer is online and accessible
+2. **Check PDF Backup**: Labels are always saved to `pdf_backup/` folder even if printing fails
+3. **Check Logs**: View print logs in `logs/` folder for error messages
+4. **Rebuild App**: If you built the app yourself, ensure `setup_sumatra.ps1` was run first to download SumatraPDF before building
+
+### Network Printers Not Showing
+
+- Network printers must be installed/connected on the machine before running the app
+- For print server printers like `\\filesibiusb05\printer`, ensure the share is accessible
+- Run as administrator if printer enumeration fails
+
+## Notes
+
+- First run may be slower (Kivy initialization)
+- PDF backups are auto-deleted after 5 days
+- Log files are auto-deleted after 5 days
+- Supports Python 3.10-3.13 (Python 3.14+ may have issues with Kivy)
diff --git a/build_windows.ps1 b/build_windows.ps1
index f563c1d..7335d9a 100644
--- a/build_windows.ps1
+++ b/build_windows.ps1
@@ -47,13 +47,39 @@ if ($LASTEXITCODE -ne 0) {
 }
 Write-Host ""
 
-Write-Host "[4/5] Cleaning old build artifacts..." -ForegroundColor Cyan
+Write-Host "[4/6] Checking for SumatraPDF..." -ForegroundColor Cyan
+$sumatraPath = "SumatraPDF\SumatraPDF.exe"
+if (-not (Test-Path $sumatraPath)) {
+    Write-Host ""
+    Write-Host "WARNING: SumatraPDF not found!" -ForegroundColor Yellow
+    Write-Host "SumatraPDF is required for silent PDF printing." -ForegroundColor Yellow
+    Write-Host ""
+    Write-Host "Run the setup script first:" -ForegroundColor Yellow
+    Write-Host "  powershell -ExecutionPolicy Bypass -File setup_sumatra.ps1" -ForegroundColor Cyan
+    Write-Host ""
+    $response = Read-Host "Continue building without SumatraPDF? (y/n)"
+    if ($response -ne "y") {
+        Write-Host "Build cancelled."
+        Read-Host "Press Enter to exit"
+        exit 1
+    }
+    Write-Host ""
+    Write-Host "Building without SumatraPDF (PDF printing will not work)..." -ForegroundColor Yellow
+    $addBinaryArg = @()
+} else {
+    Write-Host "Found: $sumatraPath" -ForegroundColor Green
+    # Add SumatraPDF as bundled binary (will be embedded inside the exe)
+    $addBinaryArg = @("--add-binary", "$sumatraPath;.")
+}
+Write-Host ""
+
+Write-Host "[5/6] Cleaning old build artifacts..." -ForegroundColor Cyan
 if (Test-Path "dist") { Remove-Item -Recurse -Force "dist" }
 if (Test-Path "build") { Remove-Item -Recurse -Force "build" }
 Remove-Item -Force "*.spec" -ErrorAction SilentlyContinue
 Write-Host ""
 
-Write-Host "[5/5] Building executable with PyInstaller..." -ForegroundColor Cyan
+Write-Host "[6/6] Building executable with PyInstaller..." -ForegroundColor Cyan
 Write-Host "This may take 5-15 minutes, please wait..."
 Write-Host ""
 
@@ -73,6 +99,11 @@ $pyinstallerArgs = @(
     "-y"
 )
 
+# Add SumatraPDF binary if available (bundles inside the exe)
+if ($addBinaryArg) {
+    $pyinstallerArgs += $addBinaryArg
+}
+
 pyinstaller @pyinstallerArgs
 if ($LASTEXITCODE -ne 0) {
     Write-Host ""
diff --git a/label_printer_gui.py b/label_printer_gui.py
index 5708c67..c13aec5 100644
--- a/label_printer_gui.py
+++ b/label_printer_gui.py
@@ -393,7 +393,7 @@ class LabelPrinterApp(App):
                     
                     # Use Clock.schedule_once to update UI from main thread
                     Clock.schedule_once(lambda dt: popup.dismiss(), 0)
-                    Clock.schedule_once(lambda dt: self.show_popup("Success", "Label printed successfully!"), 0.1)
+                    Clock.schedule_once(lambda dt: self.show_popup("Success", "Label printed successfully!", auto_dismiss=True), 0.1)
                     # Clear inputs after successful print (but keep printer selection)
                     Clock.schedule_once(lambda dt: self.clear_inputs(), 0.2)
                 else:
@@ -420,8 +420,14 @@ class LabelPrinterApp(App):
         self.cable_id_input.text = ''
         # Printer selection is NOT cleared - it persists until user changes it
     
-    def show_popup(self, title, message):
-        """Show a popup message"""
+    def show_popup(self, title, message, auto_dismiss=False):
+        """Show a popup message
+        
+        Args:
+            title (str): Popup title
+            message (str): Popup message
+            auto_dismiss (bool): If True, popup will auto-dismiss after 3 seconds
+        """
         popup = Popup(
             title=title,
             content=BoxLayout(
@@ -439,6 +445,10 @@ class LabelPrinterApp(App):
         popup.content.add_widget(close_button)
         
         popup.open()
+        
+        # Auto-dismiss after 3 seconds if requested
+        if auto_dismiss:
+            Clock.schedule_once(lambda dt: popup.dismiss(), 3)
 
 
 if __name__ == '__main__':
diff --git a/print_label.py b/print_label.py
index 06da2ac..4eb8e0e 100755
--- a/print_label.py
+++ b/print_label.py
@@ -3,6 +3,7 @@ import barcode
 from barcode.writer import ImageWriter
 import time
 import os
+import sys
 import datetime
 import platform
 import subprocess
@@ -249,51 +250,139 @@ def print_to_printer(printer_name, file_path):
             return True
         
         elif SYSTEM == "Windows":
-            # Windows: Print directly without opening PDF viewer
+            # Windows: Print PDF silently without any viewer opening
             try:
                 if WIN32_AVAILABLE:
                     import win32print
                     import win32api
                     
                     if file_path.endswith('.pdf'):
-                        # Use SumatraPDF command-line or direct raw printing
-                        # Try printing via subprocess to avoid opening a PDF viewer window
+                        # Try silent printing methods (no viewer opens)
+                        import os
+                        import winreg
                         
-                        # Method: Use win32print raw API to send to printer silently
-                        try:
-                            hprinter = win32print.OpenPrinter(printer_name)
+                        printed = False
+                        
+                        # Method 1: SumatraPDF (bundled inside exe or external)
+                        sumatra_paths = []
+                        
+                        # Get the directory where this script/exe is running
+                        if getattr(sys, 'frozen', False):
+                            # Running as compiled executable
+                            # PyInstaller extracts bundled files to sys._MEIPASS temp folder
+                            if hasattr(sys, '_MEIPASS'):
+                                # Check bundled version first (inside the exe)
+                                bundled_sumatra = os.path.join(sys._MEIPASS, 'SumatraPDF.exe')
+                                sumatra_paths.append(bundled_sumatra)
+                            
+                            # Also check app directory for external version
+                            app_dir = os.path.dirname(sys.executable)
+                            sumatra_paths.append(os.path.join(app_dir, "SumatraPDF", "SumatraPDF.exe"))
+                            sumatra_paths.append(os.path.join(app_dir, "SumatraPDF.exe"))
+                        else:
+                            # Running as script - check local folders
+                            app_dir = os.path.dirname(os.path.abspath(__file__))
+                            sumatra_paths.append(os.path.join(app_dir, "SumatraPDF", "SumatraPDF.exe"))
+                            sumatra_paths.append(os.path.join(app_dir, "SumatraPDF.exe"))
+                        
+                        # Then check system installations
+                        sumatra_paths.extend([
+                            r"C:\Program Files\SumatraPDF\SumatraPDF.exe",
+                            r"C:\Program Files (x86)\SumatraPDF\SumatraPDF.exe",
+                        ])
+                        
+                        for sumatra_path in sumatra_paths:
+                            if os.path.exists(sumatra_path):
+                                try:
+                                    subprocess.run([
+                                        sumatra_path,
+                                        "-print-to",
+                                        printer_name,
+                                        file_path,
+                                        "-print-settings",
+                                        "fit,landscape",
+                                        "-silent",
+                                        "-exit-when-done"
+                                    ], check=False, creationflags=subprocess.CREATE_NO_WINDOW)
+                                    print(f"Label sent to printer via SumatraPDF: {printer_name}")
+                                    printed = True
+                                    break
+                                except Exception as e:
+                                    print(f"SumatraPDF error: {e}")
+                        
+                        # Method 2: Adobe Reader silent printing
+                        if not printed:
+                            adobe_path = None
+                            for key_path in [
+                                r"SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\AcroRd32.exe",
+                                r"SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\Acrobat.exe"
+                            ]:
+                                try:
+                                    key = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, key_path)
+                                    adobe_path, _ = winreg.QueryValueEx(key, "")
+                                    winreg.CloseKey(key)
+                                    break
+                                except:
+                                    pass
+                            
+                            if adobe_path and os.path.exists(adobe_path):
+                                try:
+                                    subprocess.run([
+                                        adobe_path,
+                                        "/t",  # Print and close
+                                        file_path,
+                                        printer_name
+                                    ], check=False, creationflags=subprocess.CREATE_NO_WINDOW)
+                                    print(f"Label sent to printer via Adobe Reader: {printer_name}")
+                                    printed = True
+                                except:
+                                    pass
+                        
+                        # Method 3: GhostScript (if installed)
+                        if not printed:
+                            gs_paths = [
+                                r"C:\Program Files\gs\gs10.02.1\bin\gswin64c.exe",
+                                r"C:\Program Files (x86)\gs\gs10.02.1\bin\gswin32c.exe",
+                            ]
+                            # Try to find gswin in PATH
                             try:
-                                # Start a print job
-                                job_info = ("Label Print", None, "RAW")
-                                hjob = win32print.StartDocPrinter(hprinter, 1, job_info)
-                                win32print.StartPagePrinter(hprinter)
-                                
-                                # Read PDF file and send to printer
-                                with open(file_path, 'rb') as f:
-                                    pdf_data = f.read()
-                                win32print.WritePrinter(hprinter, pdf_data)
-                                
-                                win32print.EndPagePrinter(hprinter)
-                                win32print.EndDocPrinter(hprinter)
-                                print(f"Label sent to printer: {printer_name}")
-                            finally:
-                                win32print.ClosePrinter(hprinter)
-                            return True
-                        except Exception as raw_err:
-                            print(f"Raw print failed ({raw_err}), trying ShellExecute silently...")
-                            # Fallback: Use ShellExecute with printto (minimized, auto-closes)
-                            try:
-                                win32api.ShellExecute(
-                                    0, "printto", file_path,
-                                    f'"{printer_name}"', ".", 0
-                                )
-                                print(f"Label sent to printer: {printer_name}")
-                                return True
-                            except Exception as shell_err:
-                                print(f"ShellExecute print failed: {shell_err}")
-                                return True
+                                gs_result = subprocess.run(['where', 'gswin64c'], 
+                                                          capture_output=True, text=True, check=False)
+                                if gs_result.returncode == 0:
+                                    gs_paths.insert(0, gs_result.stdout.strip().split('\n')[0])
+                            except:
+                                pass
+                            
+                            for gs_path in gs_paths:
+                                if os.path.exists(gs_path):
+                                    try:
+                                        subprocess.run([
+                                            gs_path,
+                                            "-dNOPAUSE", "-dBATCH", "-dQUIET",
+                                            f"-sDEVICE=mswinpr2",
+                                            f"-sOutputFile=%printer%{printer_name}",
+                                            file_path
+                                        ], check=False, creationflags=subprocess.CREATE_NO_WINDOW)
+                                        print(f"Label sent to printer via GhostScript: {printer_name}")
+                                        printed = True
+                                        break
+                                    except:
+                                        pass
+                        
+                        if not printed:
+                            # Fallback: Let user know and save PDF
+                            print("=" * 60)
+                            print("NOTICE: Silent PDF printing requires SumatraPDF")
+                            print("SumatraPDF not found (should be bundled inside the app)")
+                            print("If you built the app yourself, ensure SumatraPDF.exe is downloaded first.")
+                            print("Run: setup_sumatra.ps1 before building")
+                            print("=" * 60)
+                            print(f"PDF saved to: {file_path}")
+                            print("The PDF can be printed manually.")
+                        
+                        return True
                     else:
-                        # Non-PDF files: print silently with notepad
+                        # Non-PDF files
                         subprocess.run(['notepad', '/p', file_path], 
                                       check=False, 
                                       creationflags=subprocess.CREATE_NO_WINDOW)
diff --git a/setup_sumatra.ps1 b/setup_sumatra.ps1
new file mode 100644
index 0000000..e595529
--- /dev/null
+++ b/setup_sumatra.ps1
@@ -0,0 +1,95 @@
+# Download and Setup SumatraPDF Portable for Label Printer
+# This script downloads SumatraPDF portable and sets up the deployment structure
+
+Write-Host ""
+Write-Host "========================================================"
+Write-Host "  Label Printer - SumatraPDF Setup"
+Write-Host "========================================================"
+Write-Host ""
+
+# Create SumatraPDF folder if it doesn't exist
+$sumatraFolder = "SumatraPDF"
+if (-not (Test-Path $sumatraFolder)) {
+    New-Item -ItemType Directory -Path $sumatraFolder -Force | Out-Null
+}
+
+# Check if SumatraPDF.exe already exists
+$sumatraExe = Join-Path $sumatraFolder "SumatraPDF.exe"
+if (Test-Path $sumatraExe) {
+    Write-Host "[OK] SumatraPDF.exe already exists at: $sumatraExe" -ForegroundColor Green
+    Write-Host ""
+    Read-Host "Press Enter to exit"
+    exit 0
+}
+
+Write-Host "[1/3] Downloading SumatraPDF portable (64-bit, ~5 MB)..." -ForegroundColor Cyan
+
+# SumatraPDF download URL (latest stable version)
+$url = "https://www.sumatrapdfreader.org/dl/rel/3.5.2/SumatraPDF-3.5.2-64.zip"
+$zipFile = "SumatraPDF-temp.zip"
+
+try {
+    # Download with progress
+    $progressPreference = 'SilentlyContinue'
+    Invoke-WebRequest -Uri $url -OutFile $zipFile -ErrorAction Stop
+    Write-Host "[OK] Download complete" -ForegroundColor Green
+} catch {
+    Write-Host "[ERROR] Failed to download SumatraPDF" -ForegroundColor Red
+    Write-Host "Error: $_" -ForegroundColor Red
+    Write-Host ""
+    Write-Host "Please download manually from:" -ForegroundColor Yellow
+    Write-Host "  https://www.sumatrapdfreader.org/download-free-pdf-viewer" -ForegroundColor Yellow
+    Write-Host "  Extract SumatraPDF.exe to the 'SumatraPDF' folder" -ForegroundColor Yellow
+    Write-Host ""
+    Read-Host "Press Enter to exit"
+    exit 1
+}
+
+Write-Host ""
+Write-Host "[2/3] Extracting..." -ForegroundColor Cyan
+
+try {
+    # Extract ZIP file
+    Add-Type -AssemblyName System.IO.Compression.FileSystem
+    [System.IO.Compression.ZipFile]::ExtractToDirectory($zipFile, $sumatraFolder)
+    Write-Host "[OK] Extraction complete" -ForegroundColor Green
+} catch {
+    Write-Host "[ERROR] Failed to extract ZIP file" -ForegroundColor Red
+    Write-Host "Error: $_" -ForegroundColor Red
+    Read-Host "Press Enter to exit"
+    exit 1
+}
+
+Write-Host ""
+Write-Host "[3/3] Cleaning up..." -ForegroundColor Cyan
+
+# Remove temporary ZIP file
+if (Test-Path $zipFile) {
+    Remove-Item $zipFile -Force
+}
+
+Write-Host "[OK] Cleanup complete" -ForegroundColor Green
+Write-Host ""
+
+# Verify installation
+if (Test-Path $sumatraExe) {
+    Write-Host "========================================================"
+    Write-Host "  SETUP SUCCESSFUL!" -ForegroundColor Green
+    Write-Host "========================================================"
+    Write-Host ""
+    Write-Host "SumatraPDF portable is now installed at:" -ForegroundColor Green
+    Write-Host "  $sumatraExe" -ForegroundColor Green
+    Write-Host ""
+    Write-Host "The Label Printer app will now be able to print PDFs silently." -ForegroundColor Green
+    Write-Host ""
+} else {
+    Write-Host "========================================================"
+    Write-Host "  SETUP INCOMPLETE" -ForegroundColor Yellow
+    Write-Host "========================================================"
+    Write-Host ""
+    Write-Host "Could not find SumatraPDF.exe after extraction." -ForegroundColor Yellow
+    Write-Host "Please check the SumatraPDF folder and ensure SumatraPDF.exe is present." -ForegroundColor Yellow
+    Write-Host ""
+}
+
+Read-Host "Press Enter to exit"