Не могу отключить сторонние репозитории для обновления

Я не могу отключить сторонние репозитории для обновления.

Я перепробовал все, включая "программное обеспечение и обновления" [другое программное обеспечение]. Также попробовал apt-get install -fкак предполагает терминал. также пытался sudo software-properties-gtk

Это то, что происходит, независимо от того, что я пытаюсь.

Errors were encountered while processing:
 /var/cache/apt/archives/linux-image-3.16.0-33-generic_3.16.0-33.44_amd64.deb
 /var/cache/apt/archives/linux-image-3.16.0-34-generic_3.16.0-34.47_amd64.deb
 /var/cache/apt/archives/linux-image-3.16.0-36-generic_3.16.0-36.48_amd64.deb
 /var/cache/apt/archives/linux-image-3.16.0-37-generic_3.16.0-37.51_amd64.deb
 /var/cache/apt/archives/linux-image-3.16.0-38-generic_3.16.0-38.52_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

The following packages have unmet dependencies:
 linux-signed-image-3.16.0-33-generic : Depends: linux-image-3.16.0-33-generic (= 3.16.0-33.44) but 3.16.0-33.44~14.04.1 is installed
 linux-signed-image-3.16.0-34-generic : Depends: linux-image-3.16.0-34-generic (= 3.16.0-34.47) but 3.16.0-34.47~14.04.1 is installed
 linux-signed-image-3.16.0-36-generic : Depends: linux-image-3.16.0-36-generic (= 3.16.0-36.48) but 3.16.0-36.48~14.04.1 is installed
 linux-signed-image-3.16.0-37-generic : Depends: linux-image-3.16.0-37-generic (= 3.16.0-37.51) but 3.16.0-37.51~14.04.1 is installed
 linux-signed-image-3.16.0-38-generic : Depends: linux-image-3.16.0-38-generic (= 3.16.0-38.52) but 3.16.0-38.52~14.04.1 is installed
E: Unmet dependencies. Try using -f.

The package system is broken

Check if you are using third-party repositories. If so, disable them, because they are a common source of problems.
Furthermore, run the following command in a Terminal: apt-get install -f

The following packages have unmet dependencies:

linux-signed-image-3.16.0-33-generic: Depends: linux-image-3.16.0-33-generic (= 3.16.0-33.44) but 3.16.0-33.44~14.04.1 is installed
                                      Depends: linux-image-extra-3.16.0-33-generic (= 3.16.0-33.44) but 3.16.0-33.44 is installed
linux-signed-image-3.16.0-34-generic: Depends: linux-image-3.16.0-34-generic (= 3.16.0-34.47) but 3.16.0-34.47~14.04.1 is installed
                                      Depends: linux-image-extra-3.16.0-34-generic (= 3.16.0-34.47) but 3.16.0-34.47 is installed
linux-signed-image-3.16.0-36-generic: Depends: linux-image-3.16.0-36-generic (= 3.16.0-36.48) but 3.16.0-36.48~14.04.1 is installed
                                      Depends: linux-image-extra-3.16.0-36-generic (= 3.16.0-36.48) but 3.16.0-36.48 is installed
linux-signed-image-3.16.0-37-generic: Depends: linux-image-3.16.0-37-generic (= 3.16.0-37.51) but 3.16.0-37.51~14.04.1 is installed
                                      Depends: linux-image-extra-3.16.0-37-generic (= 3.16.0-37.51) but 3.16.0-37.51 is installed
linux-signed-image-3.16.0-38-generic: Depends: linux-image-3.16.0-38-generic (= 3.16.0-38.52) but 3.16.0-38.52~14.04.1 is installed
                                      Depends: linux-image-extra-3.16.0-38-generic (= 3.16.0-38.52) but 3.16.0-38.52 is installed

Пожалуйста помоги.