This short walkthrough describes how to install the Ubuntu Linux Kernel 4.4.

This guide should work with the latest version of Ubuntu Linux and most Ubuntu-based distributions including Kubuntu and Mint. The included kernel files have been compiled using the generic Ubuntu configuration. A low latency version is also available in the directory of the linked files.

Installation Guide (GUI)

1. Download the kernel headers package:
   
   linux-headers-4.4.0-040400_4.4.0-040400.201601101930_all.deb
2. And the appropriate headers package for your system
   • AMD64: linux-headers-4.4.0-040400-generic_4.4.0-040400.201601101930_amd64.deb
   • ARMHF: linux-headers-4.4.0-040400-generic_4.4.0-040400.201601101930_armhf.deb
   • I386: linux-headers-4.4.0-040400-generic_4.4.0-040400.201601101930_i386.deb
   • PowerPC: linux-headers-4.4.0-040400-generic_4.4.0-040400.201601101930_ppc64el.deb
3. And the kernel image
   • AMD64: linux-image-4.4.0-040400-generic_4.4.0-040400.201601101930_amd64.deb
   • ARMHF: linux-image-4.4.0-040400-generic_4.4.0-040400.201601101930_armhf.deb
   • I386: linux-image-4.4.0-040400-generic_4.4.0-040400.201601101930_i386.deb
   • PowerPC: linux-image-4.4.0-040400-generic_4.4.0-040400.201601101930_ppc64el.deb
4. Install the files in the same order as downloaded above. So first install the headers (generic and CPU) and finally the image (1 file).
5. In the terminal run:
   
   sudo update-grub
6. Reboot and select the kernel from the bootloader menu

I will post the latest version of the 4.4 branch and 4.5 release candidates in comments below.