Not all updates can be installed - Ubuntu 14.04 lts

Sotware Updater is asking me to do a parcial upgrade now.
I cant update my ubuntu 14.04 anymore
when I Run the partial upgrade i get a message saying:
"Error autenticating some packages" and i get a long list of them.-
What did I do? What should I do now?
What is this all about? Can somebody help me and explain a lil please?

Yes i just installed like 1 week ago. Do you remember? my Hd passed away when i was trying to learn how to install runes of magic with you on playonlinux forums
So its a brand new installation. Want me to print screen so you can see?

Well I still CANT update my system and honestly I dont know what I must do OR
If I should do something about it.
Plus today I woke up and my computer gave me disk error again and was not able to start (I have a brand new HD, just bought it 1 week ago).
After several tries and touching things i left it alone for an hour.
Then i came back, start it again and everything worked like nothing happened.
Anyway I still have the Update problem. Any ideas or advices?

Ok my husband said the problem was that the new HD (the one in charge of running ubuntu) was not attached to the case correctly.
It had movement and now he fixed it and added a second drive for storage (another 500 Gb).
Anyway we removed some unwanted programs and did a cleaning with Ubuntu Tweak's Janitor
Still the software update doesnt work. Keeps asking for an upgrade.
Honestly I dont know whats wrong. Maybe something I installed manually or maybe a ppa that is not doing what it should do... I dont know... But the point is i cant update my ubuntu 14.04.
Im attaching some screenshots from my Sofware & Updates so maybe you can figure it out for me

Im going to post on ubuntu forums for answers.-

You have a lot of third party repositories enabled, which is most likely the cause of your issues. I would strongly suggest removing all the third party repositories you don't need and then performing a full system update. I don't have much experience with Ubuntu, but third party repositories are very frequently the source of major problems. Usually because the people who are maintaining such repositories often don't have the proper knowledge of software packaging.

If you are unsure of how to proceed, then I can hopefully help out a little more, but in that case I will need you to run a couple of commands in a terminal. When you run those commands, there will be a lot of output, which I will need you to copy (all of it) and paste it here.

When posting lots of text from terminal, it is much easier to read if you enclose the text within code tags. For example:

⁣[⁣CODE] $ uname -r [⁣/CODE]

Will display as:

Code:

 $ uname -r 

Which makes lots of terminal text much easier to read.

As for the commands you should run, there are two.

Code:

 sudo apt-get update 

Then just copy everything and paste here. This command simply refreshes the package database on your system, it does not change any of the installed software.

The second command is:

Code:

 sudo apt-get dist-upgrade 

This second command will upgrade any packages on your system that requires an update. This will not upgrade to a newer Ubuntu version so no worries about that. You will be asked if you want to perform the package upgrade, answer yes. Once it is done, or encounters errors, just copy everything and post it here.

EDIT: I noticed you posted while I was working on this post. I do agree, the people on Ubuntu forums are probably better suited to help as they should be know Ubuntu a lot better than those of us here that don't use it.

Im going to try your advice running those two commands on my terminal tonight when my husband gets home.
If my computer blows I need him close to fix the damages.-

Ok guys I did as I was told by Daeradin and this are files (copy/paste) from terminal that I got.
Of course, for me this is basic madarin chinese
Hope you understand this cause I really dont

Great that you put the command output in text files. That is definitely easier to read and search through than my suggestion.

Okay, it seems that the issue is related to the google chrome repository. Apt-get is complaining about a missing public key. I had to do a bit of googling since I am not too familiar with Ubuntu, and I found this command which should download the public key and sign it for use with apt-get. Trusting this public key should not be a problem since it is for the google chrome repository. So go ahead and run this command:

Code:

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 1397BC53640DB551

After this, do the same two commands that I posted above, and once again copy the output and post it here. This way I can check if it complain about any other errors.

And after that, you may want to check with the normal Ubuntu Update software to see if it still complains about partial updates. I don't know for sure, but hopefully this was the source of your error. In any case, please report back if things have changed.

the point is that i use chrome to play flash videos (for example we watch the news channel online)
and it only works with chrome - dont know why i cant watch it on firefox.

You can use flashplayer, which should be available in the official repositories. But you may also use Chrome without having the Chrome repository enabled, the repository is not a requirement.

ok after changing sata cables now my old computer is booting properly.
I did what you told me in the first 2 steps and posted the reports.
After that the Software Updater program is working without any more problems-
So Im not going to do the part with:
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 1397BC53640DB551
Looks like its not necesary.
Whole computer seems to work fine now.-
About flashplayer i looked on Ubuntu Software Center and installed Adobe Flash plugin.
Hope now the new works on firefox-
Update: I CAN WATCH THE NEWS ON FIREFOX!!!!!!! thanks for the tip.-

BTW if somebody wants to chat on IRC im online