Windows 11

Windows 11 is the successor to Windows 10, which was introduced in 2015. It is a release of the Windows NT operating system produced by Microsoft and announced on June 24, 2021. On October 5, 2021, Windows 11 was made available to the general public as a free update via Windows Update and Windows 11 Installation Assistant on qualified Windows 10 devices.

Builds
Build 21380, a very early build of Windows 11, was seen running on an Acer Aspire Vero prototype. It has not been confirmed to actually exist.

Build 21996 was the earliest available build of Windows 11, and was leaked on June 15, 2021. It replaced the older flag first introduced in Windows 8 with a new flat design; the old design is still present in certain areas presented within the build, however.