I'm trying to update my software on Ubuntu 12.10 and every time I try I receive the following warning:

Failed to download repository information
Check your Internet connection
W:Failed to fetch http://ppa.launchpad.net/cooperjona/...source/Sources 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/cooperjona/...-i386/Packages 404 Not Found
, E:Some index files failed to download. They have been ignored, or old ones used instead.

I have internet connection and I have uninstalled Stormcloud. How can I fix this issue?

Thanks in advance for the help.