Thanks for your report. It looks like this ppa http://ppa.launchpad.net/lorenzo-carbonell doesn't exist anymore. Remove it from your sources list (you can use software-properties-gtk to do it) and try to update again.
I'm closing this report because it is not a bug with Ubuntu. Don't hesitate to submit any new bug. ** Changed in: update-manager (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/785109 Title: i am not able to serach for manual updates neither do software install after adding repository -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs