Microsoft goes very small for Windows 10 1909’s ‘On’ switch

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Llatest version relies on 'enablement package' to turn on features that transform Windows 10 1903 into 1909



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22 November 2019 | 0

Microsoft has trumpeted the smaller size of Windows 10 1909, the autumn feature upgrade that broke the twice-annual mould the company used in 2017 and 2018. But how much smaller is it?

According to members of the Insider team who held an online discussion Thursday, a lot smaller.

The so-called “enablement package,” the download that when installed transforms Windows 10 1903 – the full-featured upgrade released May 21 – into November’s 1909, weighs in at just 180Kb.




“The 180Kb package is just the thing that turns on the light switch,” said one of the team members.

Windows 10 1909 is, unlike previous feature upgrades, nearly feature-free. Instead, it’s a Windows 10 analog to the old-school service packs of the past, catch-up collections of fixes made to a current but aging OS from the time it debuted (or was issued an earlier service pack).

In 1909’s case, it was months’, not years’ worth, of fixes, because Microsoft took May’s 1903, collected everything that changed from that point on, then added a handful of new features.

The two – 1903 and its rehash successor 1909 – are, Microsoft said, identical with the exception of those few new features baked into the latter. “Windows 10, versions 1903 and 1909 share a common core operating system and an identical set of system files,” is how Microsoft put it. The cumulative update for 1903 released 12 November, in fact, was identical to the delivered-same-day Windows 10 1909.

Along with the revelation that the transformative enablement package was a small download, the Insider team also commented on one of the most-important, yet-unanswered questions about 1909. Is this un-upgrade concept, with a feature-packed refresh released in the spring and a rehash issued in the fall, how Microsoft will carry on going forward?

“Will we see this cycle for every year?” a question asked in one slide marked FAQ that was shown during the Thursday webinar. “Major feature update in H1, more minor update in H2, one cumulative update for both?”

The reply was more illuminating than an earlier-this-week decline-to-comment response from a Microsoft spokeswoman. “Delivering the 19H2 feature update via cumulative update and an enablement package is a pilot program,” the FAQ stated. “There isn’t a formal plan in place to deliver future releases in the same way.”

This was the first time Microsoft has referred to the major-minor cadence exhibited by 1903 and 1909 as a pilot programme. But the latest phrasing still denies that a decision has been reached, that, in fact, there is remains a possibility Windows 10’s servicing model might return to a tempo of two equally full upgrades each year.

“We are closely monitoring feedback and hoping to learn from this type of release to help influence our future plans,” Microsoft concluded in the FAQ.

“A lot of this was to see… to figure out if we could do it,” said another team member about the 1909 un-upgrade and whether it was a one-off. “Are we doing this again? There is no formal plan saying that there’s going to be a 20H2 the same way a 19H2 was done. We wanted to try this and see how it turned out. Obviously, there was a ton of things we learned along the way: The downstream impacts, the domino effects of how this all fits together. But as we continue to work through this with Insider preview builds, we’ll see what happens.”

IDG News Service

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