Microsoft's Windows 7 has one year of free support left
One year from today -- on January 14, 2020 -- Microsoft's support for Windows 7 will cease. That means no more updates or fixes, including security fixes after that date, which is the first Patch Tuesday of 2020, unless a customer pays.
Windows 8.1 customers will continue to get security updates from Microsoft for free until January 10, 2023.