diff --git a/README.md b/README.md
index 16a65bd0d..7b9d90f36 100644
--- a/README.md
+++ b/README.md
@@ -106,10 +106,16 @@ Choose your preferred models and providers based on your requirements and prefer
 
 Launch the complete application stack (frontend, backend, and agents):
 
+### Linux / Macos
 ```bash
 bash start.sh
 ```
 
+### Windows (PowerShell)
+```powershell
+.\start.ps1
+```
+
 ## Accessing the Interface
 
 - **Web UI**: Navigate to [http://localhost:1420](http://localhost:1420) in your browser
diff --git a/python/scripts/launch.py b/python/scripts/launch.py
index 556da446b..572baca6b 100644
--- a/python/scripts/launch.py
+++ b/python/scripts/launch.py
@@ -37,22 +37,27 @@
 PROJECT_DIR = Path(__file__).resolve().parent.parent.parent
 PYTHON_DIR = PROJECT_DIR / "python"
 ENV_PATH = PROJECT_DIR / ".env"
-ENV_PATH_STR = str(ENV_PATH.resolve())
+
+# Convert paths to POSIX format (forward slashes) for cross-platform compatibility
+# as_posix() works on both Windows and Unix systems
+PROJECT_DIR_STR = PROJECT_DIR.as_posix()
+PYTHON_DIR_STR = PYTHON_DIR.as_posix()
+ENV_PATH_STR = ENV_PATH.as_posix()
 
 # Mapping from agent name to launch command
 MAP_NAME_COMMAND: Dict[str, str] = {}
 for name, analyst in MAP_NAME_ANALYST.items():
     MAP_NAME_COMMAND[name] = (
-        f"cd {PYTHON_DIR}/third_party/ai-hedge-fund && uv run --env-file {ENV_PATH} -m adapter --analyst {analyst}"
+        f"cd {PYTHON_DIR_STR}/third_party/ai-hedge-fund && uv run --env-file {ENV_PATH_STR} -m adapter --analyst {analyst}"
     )
 MAP_NAME_COMMAND[SEC_AGENT_NAME] = (
-    f"uv run --env-file {ENV_PATH} -m valuecell.agents.sec_agent"
+    f"uv run --env-file {ENV_PATH_STR} -m valuecell.agents.sec_agent"
 )
 MAP_NAME_COMMAND[TRADING_AGENTS_NAME] = (
-    f"cd {PYTHON_DIR}/third_party/TradingAgents && uv run --env-file {ENV_PATH} -m adapter"
+    f"cd {PYTHON_DIR_STR}/third_party/TradingAgents && uv run --env-file {ENV_PATH_STR} -m adapter"
 )
 BACKEND_COMMAND = (
-    f"cd {PYTHON_DIR} && uv run --env-file {ENV_PATH} -m valuecell.server.main"
+    f"cd {PYTHON_DIR_STR} && uv run --env-file {ENV_PATH_STR} -m valuecell.server.main"
 )
 FRONTEND_URL = "http://localhost:1420"
 
@@ -69,7 +74,7 @@ def check_envfile_is_set():
 def main():
     check_envfile_is_set()
     timestamp = datetime.now().strftime("%Y%m%d%H%M%S")
-    log_dir = f"{PROJECT_DIR}/logs/{timestamp}"
+    log_dir = f"{PROJECT_DIR_STR}/logs/{timestamp}"
 
     # Use questionary multi-select to allow choosing multiple agents
     selected_agents = questionary.checkbox(
diff --git a/python/scripts/prepare_envs.ps1 b/python/scripts/prepare_envs.ps1
new file mode 100644
index 000000000..3fa879dc7
--- /dev/null
+++ b/python/scripts/prepare_envs.ps1
@@ -0,0 +1,111 @@
+# PowerShell script to prepare Python environments
+# Equivalent to prepare_envs.sh
+
+$ErrorActionPreference = "Stop"
+
+# Color output functions
+function Write-Highlight($message) {
+    Write-Host $message -ForegroundColor Blue
+}
+
+function Write-Success($message) {
+    Write-Host $message -ForegroundColor Green
+}
+
+function Write-Warn($message) {
+    Write-Host $message -ForegroundColor Yellow
+}
+
+function Write-Err($message) {
+    Write-Host $message -ForegroundColor Red
+}
+
+function Highlight-Command($command) {
+    Write-Highlight "Running: $command"
+}
+
+# Check current directory and switch to python if needed
+$currentPath = Get-Location
+if ((Test-Path "python") -and (Test-Path "python\pyproject.toml") -and (Test-Path ".gitignore")) {
+    Write-Warn "Detected project root. Switching to python directory..."
+    Set-Location "python"
+} elseif (-not (Test-Path "pyproject.toml") -or -not (Test-Path "third_party")) {
+    Write-Err "Error: This script must be run from the project python directory or project root. You are in $currentPath"
+    exit 1
+}
+
+# Final check if in python directory
+if (-not (Test-Path "pyproject.toml") -or -not (Test-Path "third_party")) {
+    Write-Err "Error: Failed to switch to python directory. You are in $(Get-Location)"
+    exit 1
+}
+
+# Check if uv is installed
+if (-not (Get-Command "uv" -ErrorAction SilentlyContinue)) {
+    Write-Err "Error: 'uv' command not found. Please install 'uv' from https://docs.astral.sh/uv/"
+    exit 1
+}
+
+Write-Highlight "=========================================="
+Write-Highlight "Starting environment preparation..."
+Write-Highlight "=========================================="
+
+# Prepare main environment
+Write-Success "Project root confirmed. Preparing environments..."
+
+Write-Warn "Setting up main Python environment..."
+if (-not (Test-Path ".venv")) {
+    Highlight-Command "uv venv --python 3.12"
+    uv venv --python 3.12
+} else {
+    Write-Warn ".venv already exists, skipping venv creation."
+}
+Highlight-Command "uv sync --group dev"
+uv sync --group dev
+Write-Success "Main environment setup complete."
+
+Write-Highlight "=========================================="
+Write-Highlight "Setting up third-party environments..."
+Write-Highlight "=========================================="
+
+# Setup ai-hedge-fund environment
+Write-Warn "Setting up ai-hedge-fund environment..."
+Push-Location ".\third_party\ai-hedge-fund"
+try {
+    if (-not (Test-Path ".venv")) {
+        Highlight-Command "uv venv --python 3.12"
+        uv venv --python 3.12
+    } else {
+        Write-Warn ".venv already exists, skipping venv creation."
+    }
+    Highlight-Command "uv sync"
+    uv sync
+    Write-Success "ai-hedge-fund environment setup complete."
+} finally {
+    Pop-Location
+}
+
+Write-Warn "------------------------------------------"
+Write-Warn "Setting up TradingAgents environment..."
+Write-Warn "------------------------------------------"
+
+# Setup TradingAgents environment
+Push-Location ".\third_party\TradingAgents"
+try {
+    if (-not (Test-Path ".venv")) {
+        Highlight-Command "uv venv --python 3.12"
+        uv venv --python 3.12
+    } else {
+        Write-Warn ".venv already exists, skipping venv creation."
+    }
+    Highlight-Command "uv sync"
+    uv sync
+    Write-Success "TradingAgents environment setup complete."
+} finally {
+    Pop-Location
+}
+
+Write-Success "=========================================="
+Write-Success "All environments are set up."
+Write-Success "=========================================="
+
diff --git a/start.ps1 b/start.ps1
new file mode 100644
index 000000000..46596ac2b
--- /dev/null
+++ b/start.ps1
@@ -0,0 +1,266 @@
+# Simple project launcher with auto-install for bun and uv
+# - Windows: uses PowerShell installation scripts
+# - Supports --no-frontend, --no-backend, -h/--help options
+
+param(
+    [switch]$NoFrontend,
+    [switch]$NoBackend,
+    [Alias("h")]
+    [switch]$Help
+)
+
+$ErrorActionPreference = "Stop"
+
+$SCRIPT_DIR = Split-Path -Parent $MyInvocation.MyCommand.Path
+$FRONTEND_DIR = Join-Path $SCRIPT_DIR "frontend"
+$PY_DIR = Join-Path $SCRIPT_DIR "python"
+
+$BACKEND_PROCESS = $null
+$FRONTEND_PROCESS = $null
+
+# Color output functions
+function Write-Info($message) {
+    Write-Host "[INFO]  $message" -ForegroundColor Cyan
+}
+
+function Write-Success($message) {
+    Write-Host "[ OK ]  $message" -ForegroundColor Green
+}
+
+function Write-Warn($message) {
+    Write-Host "[WARN]  $message" -ForegroundColor Yellow
+}
+
+function Write-Err($message) {
+    Write-Host "[ERR ]  $message" -ForegroundColor Red
+}
+
+function Test-CommandExists($command) {
+    $null -ne (Get-Command $command -ErrorAction SilentlyContinue)
+}
+
+function Ensure-Tool($toolName) {
+    if (Test-CommandExists $toolName) {
+        try {
+            $version = & $toolName --version 2>$null | Select-Object -First 1
+            if (-not $version) { $version = "version unknown" }
+            Write-Success "$toolName is installed ($version)"
+        } catch {
+            Write-Success "$toolName is installed"
+        }
+        return
+    }
+
+    Write-Info "Installing $toolName..."
+    
+    if ($toolName -eq "bun") {
+        # Install bun on Windows using PowerShell script
+        try {
+            Write-Info "Installing bun via PowerShell script..."
+            # Use a new PowerShell process to avoid variable conflicts
+            $installCmd = "irm https://bun.sh/install.ps1 | iex"
+            powershell.exe -NoProfile -ExecutionPolicy Bypass -Command $installCmd
+            
+            # Add to PATH for current session
+            $bunPath = "$env:USERPROFILE\.bun\bin"
+            if (Test-Path $bunPath) {
+                $env:Path = "$bunPath;$env:Path"
+            }
+        } catch {
+            Write-Err "Failed to install bun: $_"
+            Write-Err "Please install manually from https://bun.sh/docs/installation"
+            exit 1
+        }
+    } elseif ($toolName -eq "uv") {
+        # Install uv on Windows using PowerShell script
+        try {
+            Write-Info "Installing uv via PowerShell script..."
+            # Use a new PowerShell process to avoid variable conflicts
+            $installCmd = "irm https://astral.sh/uv/install.ps1 | iex"
+            powershell.exe -NoProfile -ExecutionPolicy Bypass -Command $installCmd
+            
+            # Add to PATH for current session - check multiple possible locations
+            $possiblePaths = @(
+                "$env:USERPROFILE\.cargo\bin",
+                "$env:USERPROFILE\.local\bin",
+                "$env:LOCALAPPDATA\Programs\uv"
+            )
+            foreach ($uvPath in $possiblePaths) {
+                if (Test-Path $uvPath) {
+                    $env:Path = "$uvPath;$env:Path"
+                    break
+                }
+            }
+        } catch {
+            Write-Err "Failed to install uv: $_"
+            Write-Err "Please install manually from https://docs.astral.sh/uv/getting-started/installation/"
+            exit 1
+        }
+    } else {
+        Write-Warn "Unknown tool: $toolName"
+        exit 1
+    }
+
+    # Verify installation
+    if (Test-CommandExists $toolName) {
+        Write-Success "$toolName installed successfully"
+    } else {
+        Write-Err "$toolName installation failed. Please install manually and retry."
+        Write-Err "You may need to restart your terminal or add the tool to your PATH."
+        exit 1
+    }
+}
+
+function Compile {
+    # Backend deps
+    if (Test-Path $PY_DIR) {
+        Write-Info "Sync Python dependencies (uv sync)..."
+        Push-Location $PY_DIR
+        try {
+            # Run prepare environments script
+            if (Test-Path "scripts\prepare_envs.ps1") {
+                Write-Info "Running environment preparation script..."
+                & ".\scripts\prepare_envs.ps1"
+            } else {
+                Write-Warn "prepare_envs.ps1 not found, running uv sync directly..."
+                uv sync
+            }
+            uv run valuecell/server/db/init_db.py
+            Write-Success "Python dependencies synced"
+        } catch {
+            Write-Err "Failed to sync Python dependencies: $_"
+            exit 1
+        } finally {
+            Pop-Location
+        }
+    } else {
+        Write-Warn "Backend directory not found: $PY_DIR. Skipping"
+    }
+
+    # Frontend deps
+    if (Test-Path $FRONTEND_DIR) {
+        Write-Info "Install frontend dependencies (bun install)..."
+        Push-Location $FRONTEND_DIR
+        try {
+            bun install
+            Write-Success "Frontend dependencies installed"
+        } catch {
+            Write-Err "Failed to install frontend dependencies: $_"
+            exit 1
+        } finally {
+            Pop-Location
+        }
+    } else {
+        Write-Warn "Frontend directory not found: $FRONTEND_DIR. Skipping"
+    }
+}
+
+function Start-Backend {
+    if (-not (Test-Path $PY_DIR)) {
+        Write-Warn "Backend directory not found; skipping backend start"
+        return
+    }
+    
+    Write-Info "Starting backend (uv run scripts/launch.py)..."
+    Write-Info "Launching in CMD for better interactive terminal support..."
+    
+    # Use cmd.exe for better interactive support with questionary
+    # CMD handles ANSI escape sequences and arrow keys better than PowerShell
+    $launchCmd = "cd /d `"$PY_DIR`" && uv run --with questionary --with colorama scripts/launch.py"
+    Start-Process "cmd.exe" -ArgumentList "/k", $launchCmd -Wait
+}
+
+function Start-Frontend {
+    if (-not (Test-Path $FRONTEND_DIR)) {
+        Write-Warn "Frontend directory not found; skipping frontend start"
+        return
+    }
+    
+    Write-Info "Starting frontend dev server (bun run dev)..."
+    Push-Location $FRONTEND_DIR
+    try {
+        $script:FRONTEND_PROCESS = Start-Process -FilePath "bun" -ArgumentList "run", "dev" -NoNewWindow -PassThru
+        Write-Info "Frontend PID: $($script:FRONTEND_PROCESS.Id)"
+    } catch {
+        Write-Err "Failed to start frontend: $_"
+    } finally {
+        Pop-Location
+    }
+}
+
+function Cleanup {
+    Write-Host ""
+    Write-Info "Stopping services..."
+    
+    if ($script:FRONTEND_PROCESS -and -not $script:FRONTEND_PROCESS.HasExited) {
+        try {
+            Stop-Process -Id $script:FRONTEND_PROCESS.Id -Force -ErrorAction SilentlyContinue
+        } catch {
+            # Ignore errors
+        }
+    }
+    
+    if ($script:BACKEND_PROCESS -and -not $script:BACKEND_PROCESS.HasExited) {
+        try {
+            Stop-Process -Id $script:BACKEND_PROCESS.Id -Force -ErrorAction SilentlyContinue
+        } catch {
+            # Ignore errors
+        }
+    }
+    
+    Write-Success "Stopped"
+}
+
+function Print-Usage {
+    Write-Host @"
+Usage: .\start.ps1 [options]
+
+Description:
+  - Checks whether bun and uv are installed; missing tools will be auto-installed via PowerShell scripts.
+  - Then installs backend and frontend dependencies and starts services.
+
+Options:
+  -NoFrontend     Start backend only
+  -NoBackend      Start frontend only
+  -Help, -h       Show this help message
+"@
+}
+
+# Handle Ctrl+C and cleanup
+Register-EngineEvent PowerShell.Exiting -Action { Cleanup } | Out-Null
+try {
+    # Show help if requested
+    if ($Help) {
+        Print-Usage
+        exit 0
+    }
+
+    # Ensure tools are installed
+    Ensure-Tool "bun"
+    Ensure-Tool "uv"
+
+    # Compile/install dependencies
+    Compile
+
+    # Start services based on flags
+    if (-not $NoFrontend) {
+        Start-Frontend
+        Start-Sleep -Seconds 5  # Give frontend a moment to start
+    }
+
+    if (-not $NoBackend) {
+        Start-Backend
+    }
+
+    # If frontend is running, wait for it
+    if ($script:FRONTEND_PROCESS -and -not $script:FRONTEND_PROCESS.HasExited) {
+        Write-Info "Services running. Press Ctrl+C to stop..."
+        Wait-Process -Id $script:FRONTEND_PROCESS.Id -ErrorAction SilentlyContinue
+    }
+} catch {
+    Write-Err "An error occurred: $_"
+    exit 1
+} finally {
+    Cleanup
+}
+