From malware.news
The May 2021 Windows Updates will contain the last official security fixes for many editions of three Windows 10 operating system versions:
- Windows 10 v1803
- Windows 10 v1809
- Windows 10 v1909
For organizations with any of these versions installed on their computers, this means the end of official security patches, and a pressure to upgrade to a supported Windows 10 version. Such organization-wide operating system upgrade may seem like a simple, mostly automated task – but in reality, updates break things: