Issue #18605 has been updated by awhitenose (Alex Whitenose). I have created a simple fix which helped to run 32-bit Ruby 2.6.x up to 3.2.x on Windows 11 without getting 'unexpected ucrtbase.dll' anymore. Available here: https://github.com/oneclick/rubyinstaller2/issues/308#issuecomment-160512529... 64-bit is unaffected. But it obviously does not make any changes or help for ARM builds. ---------------------------------------- Bug #18605: Fails to run on (newer) 32bit Windows with ucrt https://bugs.ruby-lang.org/issues/18605#change-103677 * Author: lazka (Christoph Reiter) * Status: Open * Priority: Normal * Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN ---------------------------------------- 32bit ruby using ucrt has started to fail on newer Windows with "unexpected ucrtbase.dll" -> https://github.com/ruby/ruby/blob/3fb7d2cadc18472ec107b14234933b017a33c14d/w... The problem is that ruby depends on ucrt internals and those have apparently changed with newer versions. See https://github.com/msys2/MINGW-packages/pull/10878 and https://github.com/msys2/MINGW-packages/issues/10896 for some background and a potential fix. But ideally ruby wouldn't depend on Windows internals like this. thanks! -- https://bugs.ruby-lang.org/