End-of-support deadlines for a pair of Windows 10 feature upgrades will soon come into play, halting all updates, including security fixes, to affected devices.

The final updates for Windows 10 Enterprise 1607, Windows 10 Education 1607, Windows 10 Home 1709 and Windows 10 Pro 1709 will be issued a week from today, on April 9, according to Microsoft's definitive patch calendar.

Microsoft tags its feature upgrades with yymm labels that mark their purported completion dates, even though they typically reach users in a later month. Windows 10 1607, for example, began delivery Aug. 2, 2016 (not in July, as the mm half stated), and 1709 debuted Oct. 17, 2017 (not in September).

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