I just did a fresh install of Ubuntu 14.04 yesterday, because my WiFi adapter is not supported in 16.04. I am told this is likely due to the Linux kernel.
In order for my computer's WiFi adapter to work, I'm told I need to be on Linux kernel version 3.13 and no higher.
I've since installed all of the available updates in Software Updater, and am now on Ubuntu 14.04.4.
My question is: How do I ensure that I don't inadvertently upgrade my kernel beyond version 3.13? (I've heard about LTS Enablement Stack packages, but am not sure what they are, or where they will appear, so that I can avoid them.)