Desktop App

ComfyUI Desktop is the official one-click installer. It bundles Python, manages dependencies, and handles updates automatically. This is the recommended method for most users.

NVIDIA GPU Required

ComfyUI Desktop on Windows only supports NVIDIA GPUs with CUDA. If you have an AMD or Intel GPU, use the Portable Package or Manual Install instead.

Do NOT run as Administrator

Do not right-click → "Run as administrator" to install or launch ComfyUI. Running as admin causes Python package permission conflicts and can break your installation. Use a normal user account.

Step 1: Download

Download the installer from the official ComfyUI website:

comfy.org/download → Click "Download for Windows (NVIDIA)"

The download is a standard .exe installer, around 100 MB. The first launch will download additional dependencies (~15 GB).

Step 2: Install

1. Double-click the downloaded .exe file
2. Follow the Windows installer prompts
3. A ComfyUI shortcut will be created on your desktop

Step 3: First Launch Setup

Double-click the desktop shortcut to start ComfyUI. The first launch opens a setup wizard:

1. Welcome Screen

Click "Get Started" to begin.

2. GPU Selection

Select NVIDIA (should be auto-detected). Click Next.

3. Installation Location

Choose where to store the Python environment, models, and custom nodes.

Tip

Pick a drive with at least 50 GB of free space. An SSD is strongly recommended for faster model loading. See System Requirements for full hardware recommendations.

4. Migration (Optional)

If you already have a ComfyUI installation (portable or manual), you can import your existing:

• Models and checkpoints
• Custom nodes
• Workflows and settings

First-time users: Leave this blank and click Next.

5. Desktop App Settings

Configure:

• Automatic updates — keep this enabled
• Usage metrics — optional, anonymous analytics
• Mirror settings — if you're in China or have slow connections, select an alternative mirror

A green checkmark next to the mirror URL means the connection is working. If you see a red X, try a different mirror.

6. Installation Complete

The setup wizard will download and configure Python and all dependencies. This may take 5-15 minutes depending on your internet speed.

Once done, ComfyUI launches automatically and you'll see the node editor interface.

Updating

ComfyUI Desktop checks for updates automatically on startup. You can also check manually via the app menu.

Uninstalling

Uninstall via Windows Settings → Apps → ComfyUI. Note that this removes the app but may leave your models and custom nodes in the installation directory. Delete those manually if you want a clean removal.

Troubleshooting

Problem	Solution
Installer blocked by antivirus	Add an exception for the ComfyUI installer in your antivirus settings
"Unsupported device" error	Your GPU may not support CUDA. Check GPU Compatibility or try the Portable Package with --cpu flag
Mirror connection fails (red X)	Try a different mirror, or check your firewall/proxy settings
Setup stuck on "Installing Python"	Check your internet connection. The download is ~15 GB
App won't start after install	Check the error log in the terminal window. See Common Issues

File Locations

After installation, your files are organized as:

[Your Install Directory]/
├── python/              # Bundled Python (do NOT modify)
├── ComfyUI/
│   ├── models/          # Your AI models go here
│   │   ├── checkpoints/ # Main model files
│   │   ├── loras/       # LoRA files
│   │   ├── vae/         # VAE files
│   │   └── ...
│   ├── custom_nodes/    # Community plugins
│   ├── input/           # Input images
│   └── output/          # Generated images
└── resources/           # App internals (do NOT modify)

Important

Never modify files in the python/ or resources/ directories. Only work with files in the ComfyUI/ folder.

Next Steps

• Generate your first image
• Download models
• Install custom nodes