Windows 10, version 21H2 was released to the public on November 16, 2021. In the context of the Windows "Sun Valley" development cycle, 21H2 was designed as a scoped release. Unlike the substantial UI overhauls seen in earlier versions (such as 1903 or 2004), 21H2 focused on stability, security enhancements, and backend support for critical hardware technologies.
The base 21H2 ISO is language-specific. For multinational organizations, the ISO contains lang.ini . Administrators must download separate Language Pack ISOs to inject .cab files into the offline image using DISM (Deployment Image Servicing and Management) commands: DISM /Image:C:\Mount /Add-Package /PackagePath:"C:\LanguagePack.cab" windows 10 21h2 iso