If you run "sudo apt-get update" from a command line, is this the result?
Obtidos 6888kB em 17s (389kB/s) Falha ao obter http://archive.ubuntu.com/ubuntu/dists/gutsy/multiverse/binary-i386/Packages.bz2 Hash Sum mismatch -- multiverse package list fails to download https://bugs.launchpad.net/bugs/131438 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs