Windows 10 KB5071959 is an out-of-band update rolling out to all PCs that are not part of Extended Security Updates (ESU).
Microsoft says the ESU program is "not intended as a long-term solution but rather as a temporary bridge to stay secure while one migrates to a newer, supported platform."  Windows security ...
Microsoft has released the KB5068781 update, the first Windows 10 extended security update since the operating system reached end of support last month.