Re: Unable to download updates.
Open a terminal and type
Post the output back here between code tags. It will give more diagnostic information than that screenshot.
sudo apt-get update
You can copy the output form the terminal (highlight text->right click ->copy) and paste into your next post.
To use code tags in your next post, highlight the text in your post to put between code tags and hit the # button in the toolbar above where you type text.
I'll edit your post #1 and put code tags in it for you.
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