So, your mum isn't going to RTFM, but she is going to use Windows' 'Scheduled Tasks'? She must be quite an unusual person - I've never seen a tech naif do either scheduled tasks or cronjobs. If it's time-based, it goes into a calendar app, and there's not even the vague idea that the OS has it's own scheduler.

Firewalls I'll grant you, but as another commentor mentioned, there's plenty of GUI updaters around.