Windows 8 build 8305 (fbl grfx dev1)

Windows 8 build 8305 (fbl grfx dev1) is a build of Windows 8. This build was leaked on 31 December 2019. This build includes new SKUs such as "Professional", "ProfessionalWMC", "Core", "CoreSingleLanguage" and "CoreCountrySpecific". All of these SKUs have the brand new Microsoft Confidential banner in winver, except for Prerelease (Consumer Preview).