I don't know what to choose. I know enough to build my own computer and do a lot of things to fix problems but I also listen or used to listen to a IT guy I met in a chat room. He was always trying to get me to switch to Linux though, I have a few discs he sent me.
If I don't know now I usually google, if I mess it up I use Go Back and restore the comp to prior self or just reload windows. Nothing on my comp can't be replaced easy enough. Just takes time to find all the programs and sites I have bookmarked.
No I don't back up anything.