I am surprised no one mentioned AdBlock yet. Often you contract an virus/adware/... through and ad, especially when the ad is confused with a feature of the web

I am surprised no one mentioned AdBlock yet. Often you contract an virus/adware/... through and ad, especially when the ad is confused with a feature of the website. I use noscripts also, but that is not for non tech peoples. Apart from that I don't know, maybe, do not give them admin rights on the computer?