I am trying to update my system, it says that my system is up to date, but when I check for updates manually, it says
It also tells me to check my internet connection. So my kernel is not upgraded (I still have 18.104.22.168 while my friend who did a fresh install has 22.214.171.124) nor do I get system updates. How do I fix the repo problem without having to reinstall?W:Failed to fetch http://ppa.launchpad.net/aheck/ppa/u...source/Sources 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/aheck/ppa/u...-i386/Packages 404 Not Found
, E:Some index files failed to download. They have been ignored, or old ones used instead.