To further drizzle's point "sometimes people buy a computer for the first time,and just plug it in and go,it is only when something starts to go wrong they realise,a bit of housekeeping is required"
This happens quite often in our modern day world mainly because the retailer tells the first timer "it has everything". That said, the first timer goes home and plugs it in and yes there is all demo stuff from MSoffice, to Internet protection software of different companies. They don't know how to use it and when the demo period is over they hunt or ask "What can I get". Then they purchase or install the free stuff maybe not what we would recommend but. Then they go to install without uninstalling the demo stuff and this is problem #1.
Then you have the others that as one OP said in a post "I take the easy out".
Things like this are all over and in every culture. "The easy way out" I bet all the old timers can't relate to that. We made decisions based in input from family, friends,and pro's then went ahead and had to figure it out by ourselves. Don't recall a how-to list.