Imo educating works best, you can only mitigate the problem with technology. I've only installed and configured a content blocker on grandma's computer as a pas

Imo educating works best, you can only mitigate the problem with technology. I've only installed and configured a content blocker on grandma's computer as a passive measurement against scams and for general benefits. Otherwise I just advised her not to give out personal information, including email, phone and credit card numbers. And don't click links in emails she does not recognize the sender or looks suspicious. Best not to even open them. In doubt, I'm usually available to doublecheck. Pendrives caused a lot of problems in the past, luckily broadband solved most of the file transfer issues.