Microsoft dropped support for the popular Windows 7 operating system as well as Windows Server 2008 R2 in January 2020 except for business and Enterprise customers who pay the company for extended support.
Windows 10 version 1803 reached end of support last November, and in May 2020, it is Windows 10 version 1809 which won't be supported anymore by the company (again with exceptions for Enterprise and Education customers).
The support page KB4541558 reveals that several editions of Windows 10 version 1809 will reach end of support on May 12, 2020. The data coincides with Patch Tuesday of May 2020 which means that Microsoft will release security updates for the versions that reach end of servicing on that day for the last time.
Windows 10, version 1809 will reach the end of servicing on May 12, 2020. This applies to the following editions* of Windows 10 released in November of 2018:
Windows 10 Home, version 1809
Windows 10 Pro, version 1809
Windows 10 Pro for Education, version 1809
Windows 10 Pro for Workstations, version 1809
Windows 10 IoT Core, version 1809
Microsoft notes that the listed editions won't receive security updates after May 12, 2020 anymore. Customers who run these versions after May 12, 2020 who contact support will be asked to update to a supported version of Windows 10 to remain supported.
Enterprise customers get extended support; instead of the 18 months that consumers get, Enterprise customers get 30 months of support for Windows 10 versions for the second feature update release of any year.
Microsoft unveiled Windows 10 version 1809 on October 2, 2018 officially. The company had to pull the release shortly after general availability because of seriousbugs that it contained. Among the many issues were confirmed reports of data loss, bluescreens, media playback issues, reset Settings, startup issues, issues with mapped network drives, and font display issues.
It took Microsoft until December to increase the roll out speed of the operating system version again; the issues made Windows 10 version 1809 arguably the worst release of Windows 10 yet from a bug point of view.
Devices running Windows 10 version 1809 will receive security updates for three months before support ends (unless Enterprise or Education editions). Upgrades to newer versions of Windows 10 are available and most systems should be able to receive these upgrades via Windows Update or other update options.