when i run the update on my desktop i get this error
Could not download all repository indexes
The repository may no longer be available or could not be contacted because of network problems. If available an older version of the failed index will be used. Otherwise the repository will be ignored. Check your network connection and ensure the repository address in the preferences is correct.
Failed to fetch http://www.getautomatix.com/apt/dists/f ... ackages.gz 404 Not Found
Some index files failed to download, they have been ignored, or old ones used instead.
Not all updates can be installed
Run a partial upgrade, to install as many updates as possible.
This can be caused by:
. A previous upgrade which didn't complete
. Problems with some of the installed software
. Unofficial software packages not provided by Ubuntu
. Normal changes of a pre-release version of Ubuntu
This only happens on one of my computers, what should i do to fix it?