Read the info provided in link below to avoid problems with the Win 8 dual booting and for solutions if
problems encountered during and after install. UEFI - Community Ubuntu Documentation
Best to run DVD or Flash as Live before installing to see if your computer's hardware is recognized by Ubuntu
as Ubuntu most likely has all the needed drivers but occassionally hardware released after Ubuntu latest release
will have a problem.
Best to defragment Windows 8 immediately before attempting to install Ubuntu or any Linux distro as a dual boot unless 8 is installed on SSD.
Suggestion....allow at least 50 GB for Windows 8 and a minimum of 20 GB for Ubuntu.
If you intend to Upgrade Windows 8 to 8.1 you should do that before installing Ubuntu.
How to Upgrade to Windows 8.1 From Windows 8
Update to Windows 8.1 from Windows 8 - Microsoft Windows
As Cryptodan said...You can forgo the security programs. I would suggest though using the NoScript add-on in Firefox and
not running Linux as root except while installing programs from trusted sources and updating.
Edited by buddy215, 22 December 2013 - 10:18 AM.