Microsoft has promised to stop installing unstable updates when you click "Check for Updates" and it works now. Rather than automatically installing such updates, Windows offers you a "Download and Install Now" button. The button started appearing on PCs today.
We had already warned that clicking on the "Check for Updates" button will often install unstable updates. Windows Update normally waits to install large updates such as Windows 10. buggy update from october 2018 and C and D cumulative monthly updates. However, if you clicked "Check for Updates" at the wrong time, Windows would install these updates immediately. No warning would occur and there was no way to cancel it.
In other words, the "Check for Updates" button often meant "Give me unstable updates that require more testing." In fact, Microsoft has warned people not to click on them in blog posts that no average Windows user would read.
Microsoft announced major changes to Windows Update April 4, 2019. Rather than automatically installing these updates, Windows would present them as optional in the Windows 10 Settings application. The Windows Update pane will feature a "Download and Install Now" link when these less stable updates will be available. You have the choice to install them even if you clicked on "Check for Updates".
As Bleeping Computer spotted, some users of Windows 10 already see this interface. An "Other Updates Available" section provides a cumulative update that has not been installed automatically yet. We have not seen this interface on any of our Windows 10 systems yet, but Windows Central's Zac Bowden did it. Microsoft is probably doing it slowly.
Looks like the "Additional Updates Available" feature of Windows Update is live. pic.twitter.com/jQUAEWQQZq
– Zac Bowden (@zacbowden) May 2, 2019
The change would apparently be on the systems being run May 2019 update of Windows 10, also known as 1903 or 19H1 versions, but may also appear on older systems.
When the May 2019 update will be available, the installation will not be immediate. You will need to click on one of these "Download and Install Now" links. Otherwise, you can keep your current version of Windows 10 until 18 months after it is released. And when these Updates C and D arrive at the end of the month, you can safely click on "Check for Updates" without installing them. Wait a few weeks and you will get the updates in the B update next month after their test.