Ubuntu 14.04 will not update on my Dell Inspirson. I don't know what steps to take to resolve this on my own. I have already checked my system settings, software & updates and I check all sources except pre-release updates (trusty-proposed). The system updates the catch and I see updates being compiled but they always fail to download to my computer. I also tried checking the (trusty-proposed) update, with no further changes. Please help if you can.
This may be an IPv6 issue, the updates will just stall, try this to see if it helps..
Add -o Acquire::ForceIPv4=true when running apt-get.
If you want to make the setting persistent just create /etc/apt/apt.conf.d/99force-ipv4 and put Acquire::ForceIPv4 "true"; in it.
Running sudo apt-get update && sudo apt-get upgrade from the command line might give more clues to what's going on.
You could also try clearing the apt download directory with sudo apt-get clean and check you've adequate disk space.