In my opinion illiterate people should not go for DIY software maintenance, in fact they should hire local computer maintenance service. Hiring a local computer maintenance service will help them to keep there computer working fast and smooth.
I removed the link as it could be construed as spam.
Get these people Chromebooks. Nothing to configure, nothing to lose. There are options for central management as well.
I have to agree with you here. Chromebooks are very cheap and I would rather own one any day than a tablet. Considering al this person does is web browse, seems like a perfect match.