Unable to start ComfyUI v0.9.1

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1

I get this error. I try to reinstall, but the error persist:

[2026-05-14 10:50:05.161] [info] Install state: not installed
[2026-05-14 10:50:05.162] [info] Starting installation.
[2026-05-14 10:51:47.868] [info] Received renderer-ready message!
[2026-05-14 10:51:50.562] [info] Creating ComfyUI directories in C:\Users\adriacomos\Documents\ComfyUI
[2026-05-14 10:51:50.562] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\custom_nodes
[2026-05-14 10:51:50.563] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\input
[2026-05-14 10:51:50.563] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\output
[2026-05-14 10:51:50.563] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\user
[2026-05-14 10:51:50.574] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\user\default
[2026-05-14 10:51:50.574] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models
[2026-05-14 10:51:50.574] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\checkpoints
[2026-05-14 10:51:50.575] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\clip
[2026-05-14 10:51:50.575] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\clip_vision
[2026-05-14 10:51:50.575] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\configs
[2026-05-14 10:51:50.576] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\controlnet
[2026-05-14 10:51:50.576] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\diffusers
[2026-05-14 10:51:50.576] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\diffusion_models
[2026-05-14 10:51:50.577] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\embeddings
[2026-05-14 10:51:50.577] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\gligen
[2026-05-14 10:51:50.577] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\hypernetworks
[2026-05-14 10:51:50.577] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\loras
[2026-05-14 10:51:50.578] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\photomaker
[2026-05-14 10:51:50.578] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\style_models
[2026-05-14 10:51:50.578] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\text_encoders
[2026-05-14 10:51:50.578] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\unet
[2026-05-14 10:51:50.579] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\upscale_models
[2026-05-14 10:51:50.579] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\vae
[2026-05-14 10:51:50.579] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\vae_approx
[2026-05-14 10:51:50.580] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\animatediff_models
[2026-05-14 10:51:50.580] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\animatediff_motion_lora
[2026-05-14 10:51:50.580] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\animatediff_video_formats
[2026-05-14 10:51:50.581] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\liveportrait
[2026-05-14 10:51:50.581] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\insightface
[2026-05-14 10:51:50.581] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\insightface\buffalo_1
[2026-05-14 10:51:50.582] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\blip
[2026-05-14 10:51:50.582] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\blip\checkpoints
[2026-05-14 10:51:50.582] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\CogVideo
[2026-05-14 10:51:50.583] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\xlabs
[2026-05-14 10:51:50.583] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\xlabs\loras
[2026-05-14 10:51:50.583] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\xlabs\controlnets
[2026-05-14 10:51:50.583] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\layerstyle
[2026-05-14 10:51:50.584] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\LLM
[2026-05-14 10:51:50.584] [info] Directory already exists: C:\Users\adriacomos\Documents\ComfyUI\models\Joy_caption
[2026-05-14 10:51:50.589] [info] Wrote install options to comfy settings file.
[2026-05-14 10:51:50.590] [info] Creating model config files in C:\Users\adriacomos\AppData\Roaming\ComfyUI\extra_models_config.yaml
[2026-05-14 10:51:50.594] [info] Created extra_model_paths.yaml at C:\Users\adriacomos\AppData\Roaming\ComfyUI\extra_models_config.yaml
[2026-05-14 10:51:50.596] [info] Using uv at C:\Users\adriacomos\AppData\Local\Programs\ComfyUI\resources\uv\win\uv.exe
[2026-05-14 10:51:50.597] [info] Virtual environment directory already exists: C:\Users\adriacomos\Documents\ComfyUI.venv
[2026-05-14 10:51:50.598] [info] Running uv command directly: pip install --dry-run -r C:\Users\adriacomos\AppData\Local\Programs\ComfyUI\resources\ComfyUI\requirements.txt
[2026-05-14 10:51:50.598] [info] Running uv child process: uv pip install --dry-run -r C:\Users\adriacomos\AppData\Local\Programs\ComfyUI\resources\ComfyUI\requirements.txt
[2026-05-14 10:51:50.598] [info] Running command: C:\Users\adriacomos\AppData\Local\Programs\ComfyUI\resources\uv\win\uv.exe pip install --dry-run -r C:\Users\adriacomos\AppData\Local\Programs\ComfyUI\resources\ComfyUI\requirements.txt in C:\Users\adriacomos\Documents\ComfyUI
[2026-05-14 10:51:50.660] [info] Running uv command directly: pip install --dry-run -r C:\Users\adriacomos\AppData\Local\Programs\ComfyUI\resources\ComfyUI\manager_requirements.txt
[2026-05-14 10:51:50.660] [info] Running uv child process: uv pip install --dry-run -r C:\Users\adriacomos\AppData\Local\Programs\ComfyUI\resources\ComfyUI\manager_requirements.txt
[2026-05-14 10:51:50.660] [info] Running command: C:\Users\adriacomos\AppData\Local\Programs\ComfyUI\resources\uv\win\uv.exe pip install --dry-run -r C:\Users\adriacomos\AppData\Local\Programs\ComfyUI\resources\ComfyUI\manager_requirements.txt in C:\Users\adriacomos\Documents\ComfyUI
[2026-05-14 10:51:50.710] [info] Skipping requirements installation - all requirements already installed
[2026-05-14 10:51:50.711] [info] Verifying Python imports - testing 7 modules
[2026-05-14 10:51:50.711] [info] Running command: C:\Users\adriacomos\Documents\ComfyUI.venv\Scripts\python.exe -c
import json
import sys

failed_imports =

for module_name in [“yaml”,“torch”,“uv”,“toml”,“numpy”,“PIL”,“sqlalchemy”]:
try:
import(module_name)
except ImportError as e:
failed_imports.append(module_name)

Output results as JSON for easy parsing

print(json.dumps({
“failed_imports”: failed_imports,
“success”: len(failed_imports) == 0
}))

sys.exit(0 if len(failed_imports) == 0 else 1)
in C:\Users\adriacomos\Documents\ComfyUI
[2026-05-14 10:51:52.732] [info] Python import verification successful - all modules available
[2026-05-14 10:51:53.302] [info] Server start
[2026-05-14 10:51:53.310] [info] Adding custom node extra_path to config C:\Users\adriacomos\AppData\Local\Programs\ComfyUI\resources\ComfyUI\custom_nodes
[2026-05-14 10:51:53.311] [info] Created extra_model_paths.yaml at C:\Users\adriacomos\AppData\Roaming\ComfyUI\extra_models_config.yaml
[2026-05-14 10:51:53.313] [info] Running command: C:\Users\adriacomos\Documents\ComfyUI.venv\Scripts\python.exe C:\Users\adriacomos\AppData\Local\Programs\ComfyUI\resources\ComfyUI\main.py --user-directory C:\Users\adriacomos\Documents\ComfyUI\user --input-directory C:\Users\adriacomos\Documents\ComfyUI\input --output-directory C:\Users\adriacomos\Documents\ComfyUI\output --front-end-root C:\Users\adriacomos\AppData\Local\Programs\ComfyUI\resources\ComfyUI\web_custom_versions\desktop_app --base-directory C:\Users\adriacomos\Documents\ComfyUI --database-url sqlite:///C:/Users/adriacomos/Documents/ComfyUI/user/comfyui.db --extra-model-paths-config C:\Users\adriacomos\AppData\Roaming\ComfyUI\extra_models_config.yaml --log-stdout --listen 127.0.0.1 --port 8000 --enable-manager in C:\Users\adriacomos\Documents\ComfyUI
[2026-05-14 10:52:10.499] [error] Python process exited with code 3221225477 and signal null
[2026-05-14 10:52:10.519] [error] Unhandled exception during server start Error: Python process exited with code 3221225477 and signal null
at ChildProcess. (C:\Users\adriacomos\AppData\Local\Programs\ComfyUI\resources\app.asar.vite\build\main.cjs:38845:18)
at ChildProcess.emit (node:events:519:28)
at ChildProcess._handle.onexit (node:internal/child_process:294:12)
[2026-05-14 10:52:23.300] [error] @todesktop/runtime: alwaysResolve: Promise timed out after 30000ms
[2026-05-14 10:52:23.407] [info] @todesktop/runtime: Checking for update
[2026-05-14 10:52:23.407] [info] @todesktop/runtime: AutoUpdater: checking-for-update
[2026-05-14 10:52:24.612] [info] @todesktop/runtime: Update for version 0.9.1 is not available (latest version: 0.9.1, downgrade is allowed).
[2026-05-14 10:52:24.612] [info] @todesktop/runtime: AutoUpdater: update-not-available {“version”:“0.9.1”,“files”:[{“url”:“ComfyUI Setup 0.9.1 - Build 260514248i6bhdm-x64.exe”,“sha512”:“gVe0kSd+kRtUTGBZuLPjSdepKKPoW2seuHskltNq6ksKo525zf/Nl61P25mGb8elnX2N/DsXEpw8qcofY8rZEw==”,“size”:139597872}],“path”:“ComfyUI Setup 0.9.1 - Build 260514248i6bhdm-x64.exe”,“sha512”:“gVe0kSd+kRtUTGBZuLPjSdepKKPoW2seuHskltNq6ksKo525zf/Nl61P25mGb8elnX2N/DsXEpw8qcofY8rZEw==”,“releaseDate”:“2026-05-14T00:40:07.713Z”}

2

Wow! Posts like yours is why I have avoided Desktop ever since it came out. I’m not intentionally slamming it since I think many others with coding skills can diagnose and fix those kinds of things unlike me Prince of the non-coding community! I have been running portable versions and if you don’t know what that means it basically contains it’s own Python instance. Sometimes a “native” Windows Python install gets updated and throws Comfy into a tizzy because it (and its components) is expecting what was there last time you fired it up. A portable version doesn’t look for Windows Python, it uses it’s own hence a little more stable. And if you know this already, pardon me. But over the past year I switched to an iteration called “ComfyUI-Easy Install” posted by tavris on GitHub. And if you search “Pixaroma” he offers a free course dedicated to CUI and contributes a lot to tavris’ version. He covers everything CUI with a great tutorial on installing the “Easy Install.” And he recently compiled his Pixaroma node which improves standard CUI nodes which is also explained precisely in one of his videos.

I’m not trying to steer you away from Desktop. It works well for a lot of people just not me . . . and it seems you . . .

I hope this helps.