I’m completely new to ComfyUI and I can’t get it to start up. I don’t have custom nodes or anything, just a fresh install. Here is the log:
[2026-03-22 18:12:08.549] [info] Using uv at C:\Users\An\AppData\Local\Programs\ComfyUI\resources\uv\win\uv.exe
[2026-03-22 18:12:08.551] [info] Install state: installed
[2026-03-22 18:12:08.556] [info] Running uv command directly: pip install --dry-run -r C:\Users\An\AppData\Local\Programs\ComfyUI\resources\ComfyUI\requirements.txt
[2026-03-22 18:12:08.558] [info] Running uv child process: uv pip install --dry-run -r C:\Users\An\AppData\Local\Programs\ComfyUI\resources\ComfyUI\requirements.txt
[2026-03-22 18:12:08.559] [info] Running command: C:\Users\An\AppData\Local\Programs\ComfyUI\resources\uv\win\uv.exe pip install --dry-run -r C:\Users\An\AppData\Local\Programs\ComfyUI\resources\ComfyUI\requirements.txt in C:\Users\An\Documents\ComfyUI
[2026-03-22 18:12:09.152] [info] Running uv command directly: pip install --dry-run -r C:\Users\An\AppData\Local\Programs\ComfyUI\resources\ComfyUI\manager_requirements.txt
[2026-03-22 18:12:09.154] [info] Running uv child process: uv pip install --dry-run -r C:\Users\An\AppData\Local\Programs\ComfyUI\resources\ComfyUI\manager_requirements.txt
[2026-03-22 18:12:09.155] [info] Running command: C:\Users\An\AppData\Local\Programs\ComfyUI\resources\uv\win\uv.exe pip install --dry-run -r C:\Users\An\AppData\Local\Programs\ComfyUI\resources\ComfyUI\manager_requirements.txt in C:\Users\An\Documents\ComfyUI
[2026-03-22 18:12:09.763] [info] Validation result: isValid:true, state:installed {“inProgress”:false,“installState”:“installed”,“basePath”:“OK”,“venvDirectory”:“OK”,“pythonInterpreter”:“OK”,“uv”:“OK”,“pythonPackages”:“OK”,“git”:“OK”,“vcRedist”:“OK”}
[2026-03-22 18:12:10.713] [info] Server start
[2026-03-22 18:12:10.726] [info] Running command: C:\Users\An\Documents\ComfyUI.venv\Scripts\python.exe C:\Users\An\AppData\Local\Programs\ComfyUI\resources\ComfyUI\main.py --user-directory C:\Users\An\Documents\ComfyUI\user --input-directory C:\Users\An\Documents\ComfyUI\input --output-directory C:\Users\An\Documents\ComfyUI\output --front-end-root C:\Users\An\AppData\Local\Programs\ComfyUI\resources\ComfyUI\web_custom_versions\desktop_app --base-directory C:\Users\An\Documents\ComfyUI --database-url sqlite:///C:/Users/An/Documents/ComfyUI/user/comfyui.db --extra-model-paths-config C:\Users\An\AppData\Roaming\ComfyUI\extra_models_config.yaml --log-stdout --listen 127.0.0.1 --port 8000 --enable-manager in C:\Users\An\Documents\ComfyUI
[2026-03-22 18:12:10.778] [info] Received renderer-ready message!
[2026-03-22 18:12:10.780] [info] Sending queued message {“channel”:“validation-update”,“data”:{“inProgress”:false,“installState”:“installed”,“basePath”:“OK”,“venvDirectory”:“OK”,“pythonInterpreter”:“OK”,“uv”:“OK”,“pythonPackages”:“OK”,“git”:“OK”,“vcRedist”:“OK”}}
[2026-03-22 18:12:10.783] [info] Sending queued message {“channel”:“validation-update”,“data”:{“inProgress”:false,“installState”:“installed”,“basePath”:“OK”,“venvDirectory”:“OK”,“pythonInterpreter”:“OK”,“uv”:“OK”,“pythonPackages”:“OK”,“git”:“OK”,“vcRedist”:“OK”}}
[2026-03-22 18:12:10.785] [info] Sending queued message {“channel”:“validation-update”,“data”:{“inProgress”:false,“installState”:“installed”,“basePath”:“OK”,“venvDirectory”:“OK”,“pythonInterpreter”:“OK”,“uv”:“OK”,“pythonPackages”:“OK”,“git”:“OK”,“vcRedist”:“OK”}}
[2026-03-22 18:12:10.787] [info] Sending queued message {“channel”:“validation-update”,“data”:{“inProgress”:false,“installState”:“installed”,“basePath”:“OK”,“venvDirectory”:“OK”,“pythonInterpreter”:“OK”,“uv”:“OK”,“pythonPackages”:“OK”,“git”:“OK”,“vcRedist”:“OK”}}
[2026-03-22 18:12:10.789] [info] Sending queued message {“channel”:“validation-update”,“data”:{“inProgress”:false,“installState”:“installed”,“basePath”:“OK”,“venvDirectory”:“OK”,“pythonInterpreter”:“OK”,“uv”:“OK”,“pythonPackages”:“OK”,“git”:“OK”,“vcRedist”:“OK”}}
[2026-03-22 18:12:10.790] [info] Sending queued message {“channel”:“validation-update”,“data”:{“inProgress”:false,“installState”:“installed”,“basePath”:“OK”,“venvDirectory”:“OK”,“pythonInterpreter”:“OK”,“uv”:“OK”,“pythonPackages”:“OK”,“git”:“OK”,“vcRedist”:“OK”}}
[2026-03-22 18:12:10.795] [info] Sending queued message {“channel”:“validation-update”,“data”:{“inProgress”:false,“installState”:“installed”,“basePath”:“OK”,“venvDirectory”:“OK”,“pythonInterpreter”:“OK”,“uv”:“OK”,“pythonPackages”:“OK”,“git”:“OK”,“vcRedist”:“OK”}}
[2026-03-22 18:12:10.798] [info] Sending queued message {“channel”:“validation-update”,“data”:{“inProgress”:false,“installState”:“installed”,“basePath”:“OK”,“venvDirectory”:“OK”,“pythonInterpreter”:“OK”,“uv”:“OK”,“pythonPackages”:“OK”,“git”:“OK”,“vcRedist”:“OK”}}
[2026-03-22 18:12:10.799] [info] Sending queued message {“channel”:“validation-update”,“data”:{“inProgress”:false,“installState”:“installed”,“basePath”:“OK”,“venvDirectory”:“OK”,“pythonInterpreter”:“OK”,“uv”:“OK”,“pythonPackages”:“OK”,“git”:“OK”,“vcRedist”:“OK”}}
[2026-03-22 18:12:10.803] [info] Sending queued message {“channel”:“validation-update”,“data”:{“inProgress”:false,“installState”:“installed”,“basePath”:“OK”,“venvDirectory”:“OK”,“pythonInterpreter”:“OK”,“uv”:“OK”,“pythonPackages”:“OK”,“git”:“OK”,“vcRedist”:“OK”}}
[2026-03-22 18:12:10.804] [info] Sending queued message {“channel”:“loading-progress”,“data”:{“status”:“starting-server”}}
[2026-03-22 18:12:17.874] [error] Python process exited with code 3221225477 and signal null
[2026-03-22 18:12:17.881] [error] Unhandled exception during server start Error: Python process exited with code 3221225477 and signal null
at ChildProcess. (C:\Users\An\AppData\Local\Programs\ComfyUI\resources\app.asar.vite\build\main.cjs:38781:18)
at ChildProcess.emit (node:events:519:28)
at ChildProcess._handle.onexit (node:internal/child_process:294:12)
[2026-03-22 18:12:40.720] [error] @todesktop/runtime: alwaysResolve: Promise timed out after 30000ms
[2026-03-22 18:12:40.877] [info] @todesktop/runtime: Checking for update
[2026-03-22 18:12:40.879] [info] @todesktop/runtime: AutoUpdater: checking-for-update
[2026-03-22 18:12:42.900] [info] @todesktop/runtime: Update for version 0.8.24 is not available (latest version: 0.8.24, downgrade is allowed).
[2026-03-22 18:12:42.902] [info] @todesktop/runtime: AutoUpdater: update-not-available {“version”:“0.8.24”,“files”:[{“url”:“ComfyUI Setup 0.8.24 - Build 260321brf44qvgs-x64.exe”,“sha512”:“XwXGPomIVgOXNpClIFiJCvImiTO5E3nw4SK6vORGdlgbDrUILWiikLYaWwvY7y7rYjdY5h7DZv5jTIzVSSe1Ow==”,“size”:136401648}],“path”:“ComfyUI Setup 0.8.24 - Build 260321brf44qvgs-x64.exe”,“sha512”:“XwXGPomIVgOXNpClIFiJCvImiTO5E3nw4SK6vORGdlgbDrUILWiikLYaWwvY7y7rYjdY5h7DZv5jTIzVSSe1Ow==”,“releaseDate”:“2026-03-21T02:16:02.149Z”}