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Opening the Ubuntu software center yields an error that says:

Items cannot be installed or removed until the package catalog is repaired. Do you want to repair it now?

After clicking repair, the following error is returned:

Package dependencies cannot be resolved

After doing some research, many people suggest running:

sudo apt-get -f install

However, it returns:

Correcting dependencies... failed.
The following packages have unmet dependencies:
libnss3-1d: Depends: libnss3 (= 2:3.16.3-1ubuntu1) but 3.15.4-0ubuntu0.12.04.3
 is installed
 libnss3-nssdb : Depends: libnss3 (=2:3.16.3-1ubuntu1) but 3.15.4-0ubuntu0.12.04.3 is installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
E: Unable to correct dependencies

I have no idea where to go from here. If I recall correctly, I was trying to install a flash plug in for Firefox, because youtube was occasionally throwing me an error and telling me to upgrade flash player.

This error is especially frustrating, as I cannot install software until it is resolved. It is worth noting that I have also tried using Synaptic Package Manager's "fix broken dependencies" or whatever, and it didn't work.

Mitch
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akp234
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  • I've read that document and tried the first method, to no avail. If I have to purge a ppa, I do not know which one and do not want to risk removing something vital. – akp234 Sep 23 '14 at 08:40
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    The problematic packages appear to be Network Security Security libraries - shared databases and Network Security Service Libraries - Transitional Package. This can be found under Ubuntu Software Center > Installed > Unknown – akp234 Sep 23 '14 at 13:38
  • I've tried everything in "How do I resolve unmet dependencies?" The solution does not work for me. This is not a duplicate. – akp234 Sep 24 '14 at 22:31
  • Without lots of details about exactly what you have tried and what happened, it's still somewhat unlikely this could be helpfully answered beyond referring you to that question. So you may wish to [edit] this to add the details about the many attempted solutions you've tried, how you applied them, what happened, and anything else that you think may be relevant. – Eliah Kagan Sep 28 '14 at 00:04
  • I just need some help learning to diagnose the problem myself. All I know to explain is that when I was using youtube on chromium, I was told I needed to update my flash plugin. I attempted to install the newest plugin, and afterwards I started receiving this error message. Where do I even begin? – akp234 Sep 29 '14 at 05:59
  • I solved this problem on my own. I assure you it was not a duplicate question. I'm wondering if you guys even read the damn thing. – akp234 Oct 08 '14 at 15:57

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