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I am getting this error message when trying to update.

W:Failed to fetch 404 Not Found [IP: 80] , W:Failed to fetch 404 Not Found [IP: 80] , E:Some index files failed to download. They have been ignored, or old ones used instead.

And this error halts the updating process, so it never updates.

How to fix it?



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In Software Sources, label Other Software, there was a repository called "Canonical Partners Added by Software Center main". I unticked this option because still there is another source called "Canonical Partners Software Packaged by Canonical for their partners".

I also changed to USA server (I was in main), as I have seen that it seems to have some to do with Skype repository in the main server.

This seems to have solved the problem.

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