In March, Microsoft officials said they were temporarily halting the release of optional Windows 10 cumulative updates that they had been making available in the third and fourth weeks of each month due to the impact on customers from the COVID-19 coronavirus pandemic. On June 17, Microsoft officials said they are planning to resume these optional releases in July 2020 for Windows 10 and Windows Server 1809 and later.
Before March, Microsoft had been releasing updates and patches to Windows client and server almost every week. The first week of each month (A week) is typically for Office updates. B week is the second week of the month and when Patch Tuesday is — “Update Tuesday” in Microsoft’s euphemistic parlance. C and D weeks, which are the third and fourth weeks of the month, or when Microsoft releases optional cumulative updates that are intended to be previews of