Every week I'd spend a good chunk of my time with her cleaning her computer. It got massively worse when the Windows machine was hooked up to a broadband modem (with a half-decent firewall). Moving her to a Mac improved things a lot, and moving her to Linux allowed me to put her machine in my homelab monitoring systems and to manage it remotely when needed.

From that moment on, we could spend a lot more time talking, watching her TV shows, cooking. It's a quality of life issue.