Well, i found the solutions, i just used recovery tool that u get while you boot up your system and now its working perfectly!. thanks
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/659438 Title: Installation/Removal fails because of package which could not be located (failure in apt.Cache.required_download) -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs