virtualbox update? what to choose..

[asa]

hi im not sure where to find that or really what a guest machine means, basically i'm trying to find the best way to install it so i can run usb 2.0 option show up. i never used or tried anything yet, but i used a sudo-apt-get command when running linux 1 to install it the first time but then got weird i-bus errors so wanted to know if i should install in in the add software where the additional.iso file is listed, because i dont see the version 4.3.10 on the website. so basically wanted to see if anyone knew the best way, via linux lite install additonal software, or a terminal install, or what... sorry i never ran virtual box just want 2.0 usb installed on it.. thanks