Open up a Terminal (Applications > Accessories > Terminal) and type "sudo apt-get install ubuntu-restricted-extras". Does that work, or do you get an error message? If so, attach the message.
** Changed in: synaptic (Ubuntu) Status: New => Incomplete -- Cannot install 'ubuntu-restricted-extras' https://bugs.launchpad.net/bugs/340028 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs