content: You won't be needing antivirus or antimalware on Linux. It's already very secure. What kind of software are you looking for? If you want to try some games, install Steam. It should be available in the software manager (steam-launcher I think). Good luck! :) Edit: Oh, and if you're still running from USB you're missing lots of pre-installed applications. When you install the full suite it's gonna come with a bunch of free apps :)