Issue #20563 has been updated by hsbt (Hiroshi SHIBATA). Thanks @jeremyevans0 , we can drop Windows Server 2008 and 2012 at least. FYI: There is no CI and development environment of Windows Server 2016 today for us. GitHub Actions has only Windows 2019 and 2022 and I only have Windows 11. ---------------------------------------- Feature #20563: Drop support for old Windows https://bugs.ruby-lang.org/issues/20563#change-109297 * Author: nobu (Nobuyoshi Nakada) * Status: Open * Assignee: usa (Usaku NAKAMURA) ---------------------------------------- This is the table of APIs that we are calling dynamically, and the available Windows versions. DLL | API | Client | Server | ---------|--------------------------------|--------|--------| iphlpapi | ConvertInterfaceGuidToLuid | Vista | 2008 | iphlpapi | ConvertInterfaceLuidToNameA | Vista | 2008 | kernel32 | CreateSymbolicLinkW | Vista | 2008 | kernel32 | GetFileInformationByHandleEx | Vista | 2008 | kernel32 | GetFinalPathNameByHandleW | Vista | 2008 | kernel32 | SetFileInformationByHandle | Vista | 2008 | shell32 | SHGetPathFromIDListEx | Vista | 2008 | ws2_32 | inet_ntop | Vista | 2008 | ws2_32 | inet_pton | Vista | 2008 | kernel32 | GetSystemTimePreciseAsFileTime | 8 | 2012 | kernel32 | SetThreadDescription | 10 | 2016 | However, already random.c directly uses `BCryptGenRandom` that is available since Windows Vista/Server 2008. So I propose explicitly dropping support for Windows older than ~~Vista/2008~~ 8/Server 2012. https://github.com/ruby/ruby/pull/11279 Update: added iphlpapi APIs. -- https://bugs.ruby-lang.org/