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It keeps showing me this warning when i try to update

W:Failed to fetch  404  Not Found
, W:Failed to fetch  404  Not Found
, E:Some index files failed to download. They have been ignored, or old ones used instead.
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marked as duplicate by Eric Carvalho, Mitch, Seth, Jorge Castro, Raja Jul 20 '13 at 0:26

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up vote 1 down vote accepted

Those warnings have nothing to do with Steam, nor would they stop Steam from updating. They're letting you know that a PPA you have installed doesn't actually exist for your current release. You can remove it like so:

sudo add-apt-repository -r "ppa:sergio91pt/synaptics+clickpads"

Steam updates itself when you run it.

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And yet doing so fixed my issue. Thank you very much, also i apologize for the inaccurate question, I'm new to Ubuntu. – user176584 Jul 19 '13 at 15:08

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