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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 was marked as an exact duplicate of an existing 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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