Only a few versions of Windows 10 are still supported by Microsoft. And that’s a big problem for people who refuse to update, because older versions of Windows 10 no longer receive important security patches. To remedy the issue, Microsoft will force an update on customers who are still running Windows 10 version 20H1.
Microsoft is using a machine learning algorithm to roll out the first phase of its forced update. This algorithm will target PCs running Windows 10 version 20H1, which leaves Microsoft’s support cycle on May 10, 2022. This is not new information: Microsoft shared the end-of-life date for Windows 10 20H1 when it was released , and the company announced the first stage of its forced update plan in January this year.
Just to clarify, Microsoft won’t force you to update to Windows 11. The company will just push a Windows 10 version 21H2 update to your PC. Microsoft plans to support version 21H2 until June 2023.
To check your Windows 10 build number, open Settings and go to the “About” tab. If you are not running Windows 10 version 21H1 or 21H2, you will no longer receive security updates from Microsoft. I suggest updating manually to avoid a surprise update, which can be a bit annoying.
Source: Microsoft via TechRadar