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I installed Ubuntu 14.04 with a USB drive and everything works fine, the only problem is that whenever I try to install any kind of software (Chrome, Steam, etc.) it tells me that I have missing packages. For example, whenever I try to install Steam it starts applying changes, but then it says:

Package operation failed
The installation or removal of a software package failed.

In the details section commands like:

dpkg:warning:files list file for package'libsignon-qt5-1 missing; assuming package has no files currently installed

I've tried updating with sudo apt-get -f and sudo apt-get update but nothing seems to help. So is there a way to fix this and how? I'm not very familiar with Ubuntu. I've only had it for a month so far. Thanks in advance.

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