I haven’t submitted here before, so sorry for my lack of precision. Everything was fine, Comfy updated, now nothing works. Reinstalled, same problem.

same,but I update the NVDIA drivers,it work

On Mac Sequoia 15.5 doesn’t work either. I reinstall the shole thing but still doesn’t work

Unable to start after I update to latest version, try to reinstall 5 times still the same. It’s said that the error about Pytorch, python, and venv. try to clear cache, re-package python, shut off windows defender and firewall still the same. I don’t have programming background so I’m sorry for my …

Thank you for the advise. I tried it, but still not functioning.

Was able to fix my issue with the Unable to start ComfyUI v0.8.23. I’m running Windows in a laptop RTX 5070ti and used these commands in PowerShell to manually install pyTorch CUDA 12.8. Just correct your “User” path in the command before running it. Hope this helps you all. # Activate the ComfyUI …

Unable to start ComfyUI Desktop V0.8.23

Desktop Feedback Windows

rj76 March 20, 2026, 4:39pm 6

Me too. Have spent the last 4 days on this. Uninstall/reinstall loop but still won’t start.

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Unable to start ComfyUI Desktop V0.8.23

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