I am planning on giving my parents a PC, they are windows 7 folks but I am tired of service calls so I was thinking of giving them a non root Ubuntu 12.10 box. Do I need any type of antivirus or security software?
Nope. No ports are even open, so you dont have to config firewall either. Just make sure automatic updates are set to install automatically and only from original manufacturer. Thats pretty much it. Oh yes, as your sayed, non-root ubuntu, dont tell them the root/administrator password and give them user account (autologin) anyway.