Have you heard of System Restore? You know, the utility that was supposed to put things back the way they were should the system ever get messed up? Oh but it doesn't work against malware.

Security is more than being impervious to every conceivable attack. Just being able to restore an infected system would have made their platform "reasonable". But they didn't.

Also, windows defender was YEARS too late. Which was why I specified the 10 year window.