Comment 3 for bug 1400096

Hello, Dorian

This is how to change the repositories list manually.
1. Browse to this directory: "/etc/apt/sources.list.d".
2. Open "official-package-repositories.list" as administrator.
3. Make file to look exactly like this:

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deb http://mirrors.serverhost.ro/mint/packages rebecca main upstream import

deb http://extra.linuxmint.com rebecca main

deb http://ro.archive.ubuntu.com/ubuntu trusty main restricted universe multiverse
deb http://ro.archive.ubuntu.com/ubuntu trusty-updates main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse
deb http://archive.canonical.com/ubuntu/ trusty partner
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While this bug is not fixed, use the method, explained above.