Running Ubuntu 10.04, having the error: Could not download all repository indexes

[mhidalgo]

About 9 days ago I started to get this error. I thought maybe a problem online, but is not going away, so can anyone tell me what to do, thank you!: Also I get the Warning triangle....

Could not download all repository indexes
Failed to fetch http://archive.ubuntu.com/ubuntu/dists/feisty/universe/binary-i386/Packages.gz 404 Not Found [IP: 91.189.88.46 80]
Failed to fetch http://archive.ubuntu.com/ubuntu/dists/feisty/multiverse/binary-i386/Packages.gz 404 Not Found [IP: 91.189.88.46 80]
Failed to fetch http://archive.ubuntu.com/ubuntu/dists/feisty/universe/source/Sources.gz 404 Not Found [IP: 91.189.88.46 80]
Failed to fetch http://archive.ubuntu.com/ubuntu/dists/feisty/multiverse/source/Sources.gz 404 Not Found [IP: 91.189.88.46 80]

[.nedberg]

Those are Feisty (7.04) repos. You should delete them!

Ubuntu 7.04's support ended on 19 October 2008...

[.nedberg]

Only delete them if you are not running Feisty. If you are, then you should update to something newer. Lucid is the latest, 10.04.

[mhidalgo]

Thank You!