August 11, 2020—KB4571723 (Security-only update)

August 11, 2020—KB4571723 Security-only update IMPORTANT Windows 8.1 and Windows Server 2012 R2 have reached the end of mainstream support and are now in extended support. Starting in July 2020, there will no longer be optional, non-security releases known as "C" releases for this operating syste...