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Possible Duplicate:
Can I skip over releases?
How to install software or upgrade from old unsupported release?

I was using Natty for a while, but while updating to the new release there was a blackout and it wasn't able to finish and Ubuntu failed to load after that. I thought, no worries I got my files backed up and I still got my 10.10 CD I used to put Ubuntu in my computer in the first place. So I installed it again, with the plan of using the update manager to get myself with the current release... Except I get this error: W:Failed to fetch 404 Not Found , W:Failed to fetch 404 Not Found , E:Some index files failed to download, they have been ignored, or old ones used instead.

My internet connection is just fine, seeing as I'm able to post this, but I don't know what else to do. Tried to download Quantal in another computer and putting it on a DVD (since it won't fit in a CD...) and the stupid thing fails to load it, it skips it over and goes right back to Maverick... (not a faulty disk, it installed Ubuntu just fine in a friends computer...)

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marked as duplicate by psusi, stephenmyall, Ringtail, Jorge Castro, fossfreedom Dec 19 '12 at 9:34

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

10.10 reached end of life in April and 11.04 reached end of life in October. You should just download and install 12.04 or 12.10. – psusi Dec 18 '12 at 23:11
Like I said, I downloaded 12.10 and put it on a disk, but it fails to load. – Ana Solís Dec 18 '12 at 23:44

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