does your parent and sister started to use the linux OS rather than windows? if yes that's great because some non-technical users are hard to decide converting linux.
Well, my parents did actually use Windows for a short period, but appeared more comfortable with Ubuntu. It also boots a lot quicker too, which is important since the laptop they've got is faulty, whereby if you put it into suspend the power fails because the battery holds no charge, so it has to be booted from scratch each time. My sister has only ever had Ubuntu, which runs very smoothly on the old hardware she has. I got her one of those Ubuntu vase speakers too.