The latest ComfyUI Desktop for windows launch failed

Desktop Feedback Windows
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2026-03-14 10:04:12.961\] \[info\] Validating installation. Recorded state: \[installed

[2026-03-14 10:04:12.963] [info] Running uv command directly: pip install --dry-run -r D:\Program Files\ComfyUI\resources\ComfyUI\requirements.txt

[2026-03-14 10:04:12.963] [info] Running uv child process: uv pip install --dry-run -r D:\Program Files\ComfyUI\resources\ComfyUI\requirements.txt

[2026-03-14 10:04:12.963] [info] Running command: D:\Program Files\ComfyUI\resources\uv\win\uv.exe pip install --dry-run -r D:\Program Files\ComfyUI\resources\ComfyUI\requirements.txt in C:\Users\Ryota\Documents\ComfyUI

[2026-03-14 10:04:12.990] [info] Running uv command directly: pip install --dry-run -r D:\Program Files\ComfyUI\resources\ComfyUI\manager_requirements.txt

[2026-03-14 10:04:12.990] [info] Running uv child process: uv pip install --dry-run -r D:\Program Files\ComfyUI\resources\ComfyUI\manager_requirements.txt

[2026-03-14 10:04:12.990] [info] Running command: D:\Program Files\ComfyUI\resources\uv\win\uv.exe pip install --dry-run -r D:\Program Files\ComfyUI\resources\ComfyUI\manager_requirements.txt in C:\Users\Ryota\Documents\ComfyUI

[2026-03-14 10:04:13.041] [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”}

[2026-03-14 10:04:13.990] [info] Server start

[2026-03-14 10:04:13.994] [info] Running command: C:\Users\Ryota\Documents\ComfyUI\.venv\Scripts\python.exe D:\Program Files\ComfyUI\resources\ComfyUI\main.py --user-directory C:\Users\Ryota\Documents\ComfyUI\user --input-directory C:\Users\Ryota\Documents\ComfyUI\input --output-directory C:\Users\Ryota\Documents\ComfyUI\output --front-end-root D:\Program Files\ComfyUI\resources\ComfyUI\web_custom_versions\desktop_app --base-directory C:\Users\Ryota\Documents\ComfyUI --database-url sqlite:///C:/Users/Ryota/Documents/ComfyUI/user/comfyui.db --extra-model-paths-config C:\Users\Ryota\AppData\Roaming\ComfyUI\extra_models_config.yaml --log-stdout --listen 127.0.0.1 --port 8000 --enable-manager in C:\Users\Ryota\Documents\ComfyUI

[2026-03-14 10:04:14.000] [info] Received renderer-ready message!

[2026-03-14 10:04:45.617] [error] Python process exited with code 1 and signal null

[2026-03-14 10:04:45.627] [error] Unhandled exception during server start Error: Python process exited with code 1 and signal null

*at ChildProcess.<anonymous> (D:\\Program Files\\ComfyUI\\resources\\app.asar\\.vite\\build\\main.cjs:38760:18)*

*at ChildProcess.emit (node:events:519:28)*

*at ChildProcess.\_handle.onexit (node:internal/child_process:294:12)*
2

I wanted to add I have the same issue. But I captured the comfyui.log and post it below so everyone can see it. Basically, I think that if you already have a Python installation on your computer above 3.12, there is no way to install or use ComfyUI. But, as you can see from this log, there are a lot of other issues. I have an AMD laptiop, and its wanting to load NVIDIA only files!

[2026-03-15 10:57:55.725] [info] comfy-aimdo failed to load: Could not find module ‘C:\Users\Ryzen9\Downloads\ComfyUI.venv\Lib\site-packages\comfy_aimdo\aimdo.dll’ (or one of its dependencies). Try using the full path with constructor syntax.
NOTE: comfy-aimdo is currently only support for Nvidia GPUs

[2026-03-15 10:57:55.845] [info] Adding extra search path custom_nodes C:\Users\Ryzen9\Downloads\ComfyUI\custom_nodes
Adding extra search path download_model_base C:\Users\Ryzen9\Downloads\ComfyUI\models
Adding extra search path custom_nodes C:\Users\Ryzen9\AppData\Local\Programs\ComfyUI\resources\ComfyUI\custom_nodes

[2026-03-15 10:57:55.846] [info] Setting output directory to: C:\Users\Ryzen9\Downloads\ComfyUI\output
Setting input directory to: C:\Users\Ryzen9\Downloads\ComfyUI\input
Setting user directory to: C:\Users\Ryzen9\Downloads\ComfyUI\user

[2026-03-15 10:57:56.788] [info] [START] Security scan
[DONE] Security scan
** ComfyUI startup time: 2026-03-15 10:57:56.775

[2026-03-15 10:57:56.790] [info] ** Platform: Windows
** Python version: 3.12.11 (main, Aug 18 2025, 19:17:54) [MSC v.1944 64 bit (AMD64)]
** Python executable: C:\Users\Ryzen9\Downloads\ComfyUI.venv\Scripts\python.exe
** ComfyUI Path: C:\Users\Ryzen9\AppData\Local\Programs\ComfyUI\resources\ComfyUI
** ComfyUI Base Folder Path: C:\Users\Ryzen9\AppData\Local\Programs\ComfyUI\resources\ComfyUI
** User directory: C:\Users\Ryzen9\Downloads\ComfyUI\user
** ComfyUI-Manager config path: C:\Users\Ryzen9\Downloads\ComfyUI\user__manager\config.ini
** Log path: C:\Users\Ryzen9\Downloads\ComfyUI\user\comfyui.log

[2026-03-15 10:57:57.476] [info] [ComfyUI-Manager] Skipped fixing the ‘comfyui-frontend-package’ dependency because the ComfyUI is outdated.

[2026-03-15 10:57:57.478] [info] [PRE] ComfyUI-Manager

[2026-03-15 10:57:58.924] [error] Windows fatal exception: access violation

Stack (most recent call first):
File “C:\Users\Ryzen9\Downloads\ComfyUI.venv\Lib\site-packages\torch\cuda_init_.py”, line 182 in is_available
File “C:\Users\Ryzen9\Downloads\ComfyUI.venv\Lib\site-packages\comfy_kitchen\backends\cuda_init_.py”, line 639 in register
File "C:\Users\Ryzen9\Downloads\ComfyUI.venv\Lib\site-packages\comfy_kitchen\backends\cuda_init.py", line 650 in
File “”, line 488 in _call_with_frames_removed
File “”, line 999 in exec_module
File “”, line 935 in _load_unlocked
File “”, line 1331 in _find_and_load_unlocked
File “”, line 1360 in _find_and_load
File “”, line 488 in _call_with_frames_removed
File “”, line 1415 in handle_fromlist
File "C:\Users\Ryzen9\Downloads\ComfyUI.venv\Lib\site-packages\comfy_kitchen_init.py", line 3 in
File “”, line 488 in _call_with_frames_removed
File “”, line 999 in exec_module
File “”, line 935 in _load_unlocked
File “”, line 1331 in _find_and_load_unlocked
File “”, line 1360 in _find_and_load
File “C:\Users\Ryzen9\AppData\Local\Programs\ComfyUI\resources\ComfyUI\comfy\quant_ops.py”, line 5 in
File “”, line 488 in _call_with_frames_removed
File “”, line 999 in exec_module
File “”, line 935 in _load_unlocked
File “”, line 1331 in _find_and_load_unlocked
File “”, line 1360 in _find_and_load
File “C:\Users\Ryzen9\AppData\Local\Programs\ComfyUI\resources\ComfyUI\comfy\memory_management.py”, line 5 in
File “”, line 488 in _call_with_frames_removed
File “”, line 999 in exec_module
File “”, line 935 in _load_unlocked
File “”, line 1331 in _find_and_load_unlocked
File “”, line 1360 in _find_and_load
File “C:\Users\Ryzen9\AppData\Local\Programs\ComfyUI\resources\ComfyUI\comfy\utils.py”, line 23 in
File “”, line 488 in _call_with_frames_removed
File “”, line 999 in exec_module
File “”, line 935 in _load_unlocked
File “”, line 1331 in _find_and_load_unlocked
File “”, line 1360 in _find_and_load
File “C:\Users\Ryzen9\AppData\Local\Programs\ComfyUI\resources\ComfyUI\main.py”, line 194 in