A Windows Activator, in the context of Windows 11 or any other Windows version, refers to a tool or software used to activate a Windows installation. Activation is a process that verifies that your copy of Windows is genuine and hasn’t been used on more devices than allowed by the license terms. Activators can be official, provided by Microsoft, or unofficial, developed by third parties.
Windows 11 build 21996.1 is an unofficial, leaked preview build Windows 11 build 21996.1 x64 Activator
Which of these would you like?