Problem with downloading updates

To everybody that is trying to help me, yesterday I made a test installing/updating Elder Scrolls Online, it was successfull, the game had 31Gb of update to do and it worked. I did some things, I do not know if this will help another persons, but...

I did this:

1 - I cut the conection of other equipaments that were using my internet through Wi-Fi (Cell phone and notebook). This way only my Xbox was using the internet in my home.

2 - I plugged the Internet Cable on the Xbox instead of using Wi-Fi conection.

3 - I let it Installing/Updating during the night.

On the next day the game was fully installed and updated, completely playable. I will test this process with Overwatch that have only 3.4Gb of updates and I will come here as soon as possible to inform you if it works.

Hi

Do you know if you are in the preview preview program and running that software on the console?

ShameOnAMonkk, I will try to do that again, I am not sure it will help, but it can.

ProphetofSword

1 - I have a lot of space, I redefine my console deleting all data. I have Halo 5, Limbo and YUGIOH intalled, but they aren't too much.

2 - You mean the powercycle (Hold the power buttom for 10 seconds)?

3 - I am doing individually, I give up for Overwatch for a moment and tried XCON.

I will try to do what both of you said to me, every help is welcome. What I think is strange is that every time that I cancel the donwload or update and try again the progress stops in the same percentage

(Overwatch allways stops at 51% and XCON in 28%).

I have tried a power cycle and that didn't help much in the past and I had already uninstalled Ghosts and reinstalled it. The problem is that they are going very slow. Over night I left my Xbox in standby mode and ghosts went to 25% complete with dead
rising 3 stuck at 6%.

From:-
support.xbox.com/.../system-update-help

This error occurs if your console has been tampered with or modified. Your console can no longer connect to Xbox LIVE, install software updates, or play new games that require a console software update.

Physically disconnect your network cable or remove your Xbox 360 Wireless Network Adapter from the console.

You can use the following steps to turn off the automatic sign-in so that you can play games offline. To turn off auto sign-in:

1. Restart your console.
2. Select No if you are prompted to update your console software.
   
3. Press the Guide button on your controller.
   
4. Go to Settings, and then select Profile.
   
5. Select Sign-in Preferences.
   
6. Set Profile Auto Sign-in to Off.
   
7. Press the B button on your controller to return to the Xbox Dashboard.
   

Your console can now play your existing games offline. Any future attempts to sign into Xbox LIVE or update your console software will result in an error.