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i can't check to install this available update here is my problem about my ubuntu:

i have tried it from terminal with sudo apt-get update, but it still unsolved

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can you post the errors you got,along with the question. If you are behind a proxy, you need to have a apt.conf file in /etc/apt with your uname and password along with the pxoy details.give more details. – sai siva sundar Nov 16 '12 at 9:38
What happens when you tick an item in the update manager? – Flimm Nov 30 '12 at 15:59

It's caused by those files requiring other files to be installed/removed in order to be installed, but Ubuntu doesn't allow this by default.

To fix this you should run sudo apt-get dist-upgrade

I had this issue earlier, and it resolved itself automatically one day for some reason. :/

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