@silver_huskey Depending on what your mom does with her computer, I think it's worth seriously considering Linux.
It's a relatively expensive brand, installing Linux on whatever old computer you have lying around is cheaper, but I've had good luck with System76: https://system76.com/
They're the Mac of the Linux world, because they make their own OS (flavor of Linux) and their own hardware, so they can make sure it "just works". Good support.
My less technical partner got one recently, too.