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I have a red warning sign in my toolbar. When I click on it, it asks me to check for updates. When I check for updates, I get this:

W:Failed to fetch  404  Not Found [IP: 80]    
W:Failed to fetch  404  Not Found [IP: 80]
E:Some index files failed to download. They have been ignored, or old ones used instead.

This happened to me once before when 12.04 was still in beta, but I can't remember what I did. It was a huge mess!

12.04 64-bit
Sony Vaio VGN-NW220F

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Whatever that Google repository was, it's gone now. If it was a PPA, you can try removing/unchecking it in Software Sources. If you added those lines manually to sources.list, remove and run sudo apt-get update.

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I don't see those in Software Sources. – Klikini Jul 21 '12 at 16:51
They aren't in sources.list either. – Klikini Jul 21 '12 at 16:55
Please Pastebin the output of ls -la /etc/apt/sources.list.d – izx Jul 21 '12 at 21:51 – Klikini Jul 21 '12 at 22:55
Does this help? – Klikini Jul 23 '12 at 0:06

It looks like you (or a piece of Google software) added a Google repository that is no longer valid. This shouldn't prevent you from updating the rest of the system.

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I added them a long time ago. They were working fine for Google Earth before. – Klikini Jul 21 '12 at 16:49

Found a mirror of that site here:

Looks like it contained the apt repo for Picasa, which Google has officially discontinued for Linux. Hence they pulled the plug on the repo itself. Would have been nice if they simply left it up, but then again, this way you know it's gone and can move on (to the Windows Wine version).

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I don't see the old one in the dialogue from the software centre or the sources.list file. That's the problem. – Klikini Aug 16 '12 at 22:17

Not really a perfect answer, but I reinstalled Ubuntu in a clean upgrade.

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