Repeated errors occurred when installing Python.
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PS C:\ComfyUI> & “C:\Users\new\AppData\Local\Programs@comfyorgcomfyui-electron
resources\uv\win\uv.exe” “pip” “install” “torch” “torchvision” “torchaudio” "–i
Resolved 14 packages in 4.95s
Prepared 14 packages in 9m 39s
Installed 14 packages in 29.84s
PS C:\ComfyUI> & “C:\Users\new\AppData\Local\Programs@comfyorgcomfyui-electron
resources\uv\win\uv.exe” “pip” “install” “torch” “torchvision” “torchaudio” "–i
Resolved 14 packages in 4.17s
Prepared 1 package in 8m 42s
Installed 14 packages in 30.50s
- filelock==3.13.1
- fsspec==2024.6.1
- jinja2==3.1.4
- markupsafe==2.1.5
- mpmath==1.3.0
- networkx==3.3
- numpy==2.1.2
- pillow==11.0.0
- setuptools==70.2.0
- torch==2.8.0+cu128
- torchaudio==2.8.0+cu128
- torchvision==0.23.0+cu128
- typing-extensions==4.12.2
PS C:\ComfyUI> echo “_-end-1754810020873:?”
*-end-1754810020873:True
PS C:\\ComfyUI> & “C:\\Users\\new\\AppData\\Local\\Programs@comfyorgcomfyui-electron
resources\\uv\\win\\uv.exe” “pip” “install” “-r” “C:\\Users\\new\\AppData\\Local\\Progra
ms@comfyorgcomfyui-electron\\resources\\ComfyUI\\requirements.txt” “–index-url” "
https://mirrors.tuna.tsinghua.edu.cn/pypi/web/simple"
⠹ comfyui-workflow-templates==0.1.51
error: Failed to unzip wheel: tqdm-4.67.1-py3-none-any.whl
Caused by: an upstream reader returned an error: io error occurred: HTTP statu
s client error (403 Forbidden) for url (https://mirrors.tuna.tsinghua.edu.cn/pyp
i/web/packages/d0/30/dc54f88dd4a2b5dc8a0279bdd7270e735851848b762aeb1c1184ed1f6b1
4/tqdm-4.67.1-py3-none-any.whl)
Caused by: io error occurred: HTTP status client error (403 Forbidden) for url
(https://mirrors.tuna.tsinghua.edu.cn/pypi/web/packages/d0/30/dc54f88dd4a2b5dc8
a0279bdd7270e735851848b762aeb1c1184ed1f6b14/tqdm-4.67.1-py3-none-any.whl)
Caused by: HTTP status client error (403 Forbidden) for url (https://mirrors.t
una.tsinghua.edu.cn/pypi/web/packages/d0/30/dc54f88dd4a2b5dc8a0279bdd7270e735851
848b762aeb1c1184ed1f6b14/tqdm-4.67.1-py3-none-any.whl)
PS C:\\ComfyUI> echo "*-end-1754810579900:?"
_-end-1754810579900:False
A new user can upload files. 
[2025-08-10 00:43:19.821] [info]
Installed 14 packages in 28.46s
- filelock==3.13.1
- fsspec==2024.6.1
- jinja2==3.1.4
- markupsafe==2.1.5
[2025-08-10 00:43:19.836] [info]
- mpmath==1.3.0
- networkx==3.3
- numpy==2.1.2
[2025-08-10 00:43:19.849] [info]
- pillow==11.0.0
- setuptools==70.2.0
- sympy==1.13.3
[2025-08-10 00:43:19.851] [info]
[2025-08-10 00:43:19.855] [info] + torch==2.8.0+cu128
[2025-08-10 00:43:19.861] [info]
- torchaudio==2.8.0+cu128
[2025-08-10 00:43:19.866] [info]
- torchvision==0.23.0
[2025-08-10 00:43:19.867] [info] +cu128
[2025-08-10 00:43:19.873] [info]
- typing-extensions==4.12.2
[2025-08-10 00:43:19.881] [info]
[2025-08-10 00:43:19.910] [info] PS C:\ComfyUI>
[2025-08-10 00:43:19.924] [info] PS C:\ComfyUI> echo “_-end-1754756440335:$?”
_-end-1754756440335:False
PS C:\ComfyUI> & “C:\Users\new\AppData\Local\Programs@comfyorgcomfyui-electron
resources\uv\win\uv.exe” “pip” “install” “torch” “torchvision” “torchaudio” “–i
ndex-url” “https://download.pytorch.org/whl/cu128”
Resolved 14 packages in 4.81s
Prepared 14 packages in 22m 02s
Installed 14 packages in 28.46s
- filelock==3.13.1
- fsspec==2024.6.1
- jinja2==3.1.4
- markupsafe==2.1.5
- mpmath==1.3.0
- networkx==3.3
- numpy==2.1.2
- pillow==11.0.0
- setuptools==70.2.0
- sympy==1.13.3
- torch==2.8.0+cu128
- torchaudio==2.8.0+cu128
- torchvision==0.23.0+cu128
- typing-extensions==4.12.2
PS C:\ComfyUI> echo “_-end-1754756443372:$?”
_-end-1754756443372:True
[2025-08-10 00:43:19.926] [info] Installing ComfyUI requirements from C:\Users\new\AppData\Local\Programs@comfyorgcomfyui-electron\resources\ComfyUI\requirements.txt
[2025-08-10 00:43:19.927] [info] Running uv command: & “C:\Users\new\AppData\Local\Programs@comfyorgcomfyui-electron\resources\uv\win\uv.exe” “pip” “install” “-r” “C:\Users\new\AppData\Local\Programs@comfyorgcomfyui-electron\resources\ComfyUI\requirements.txt” “–index-url” “https://mirrors.tuna.tsinghua.edu.cn/pypi/web/simple”
[2025-08-10 00:43:19.929] [info]
[2025-08-10 00:43:19.940] [info] PS C:\ComfyUI>
[2025-08-10 00:43:19.994] [info]
[2025-08-10 00:43:20.015] [info] > & "C:\Users\new
[2025-08-10 00:43:20.021] [info] > & “C:\Users\new\AppData\Local\Programs@comfyorgcomfyui-electron
[2025-08-10 00:43:20.022] [info]
resources\uv\win\uv.exe” “pip” “install” “-r” “C:\Users\new\AppData\Local\Progra
ms@comfyorgcomfyui-electron\resources\ComfyUI\requirements.txt” “–index-url” "
[2025-08-10 00:43:20.030] [info]
Resolved 14 packages in 4.81s
Prepared 14 packages in 22m 02s
Installed 14 packages in 28.46s
- filelock==3.13.1
- fsspec==2024.6.1
- jinja2==3.1.4
- markupsafe==2.1.5
- mpmath==1.3.0
- networkx==3.3
- numpy==2.1.2
- pillow==11.0.0
- setuptools==70.2.0
- sympy==1.13.3
- torch==2.8.0+cu128
- torchaudio==2.8.0+cu128
- torchvision==0.23.0+cu128
- typing-extensions==4.12.2
PS C:\ComfyUI> echo “_-end-1754756443372:$?”
_-end-1754756443372:True
PS C:\ComfyUI> & “C:\Users\new\AppData\Local\Programs@comfyorgcomfyui-electron
resources\uv\win\uv.exe” “pip” “install” “-r” “C:\Users\new\AppData\Local\Progra
ms@comfyorgcomfyui-electron\resources\ComfyUI\requirements.txt” “–index-url” "
https://mirrors.tuna.tsinghua.edu.cn/pypi/web/simple"
[2025-08-10 00:43:20.164] [info] ⠋ Resolving dependencies…
[2025-08-10 00:43:20.180] [info]
⠙ Resolving dependencies…
[2025-08-10 00:43:20.376] [info]
⠹ Resolving dependencies…
[2025-08-10 00:43:20.472] [info]
⠹ comfyui-workflow-templates==0.1.35
[2025-08-10 00:43:20.588] [info]
⠸ comfyui-workflow-templates==0.1.35
[2025-08-10 00:43:20.779] [info]
[2025-08-10 00:43:20.781] [info]
error: Failed to unzip wheel: transformers-4.55.0-py3-none-any.whl
[2025-08-10 00:43:20.782] [info]
Question, why do you install Python? Comfy runs in an venv, and comes usually with everything needed.
I don’t know why. It just errors repeatedly when I try to install Comfyui. What’s even stranger is that I installed Python separately, but it seems that Comfyui didn’t detect it.
That’s the standalone, right? I would suggest to install the portable version instead.
The global python installation at your system has nothing to do with the python installation that comes with comfyui. ComfyUI runs in a virtual environment. That’s two independent things. DON’T install python in Comfyui. You will break it. And that’s most probably what already happened.
Note that i am just a user like you. Maybe one of the devs can tell you more exact what is borked here.
Kind regards
Arunderan
Thank you very much! It seems that this is the only option.
You can delete the “uv“ folder from (C:\Users\userName\AppData\Roaming\) and reinstall comfyUI
