Source: Windows Central Starting on May 18, 2021, Microsoft is finally making available the Windows 10 May 2021 Update (version 21H1). This rollout represents refresh number eleven for laptops and desktops, and it is yet another update that brings improvements for security, remote access, and overall quality. However, things will be different this time around. Instead of making the first feature update of the year the most significant and the second one a minor release, Microsoft is making the second refresh the bigger update with new significant features and improvements, and the first update will be considered the minor release. As a result, the May 2021 Update will be rolling out as a quick quality update for devices already using versions 20H2 and 2004. On computers running the November 2019 Update (version 1909) or older, the process won't change, and the upgrade will require complete reinstallation. The only caveat is that the new update will roll out slowly, which means that initially, not every device will be able to install the first semi-annual update.