Today I had the same problem with setup-x86_64.exe on Windows 10. I tried using setup-2.899.x86_64.exe. It worked and Cygwin works. There was one warning during the setup: "This setup is version 2.899, but setup.ini claims version 2.904 is available...". -- Sent from: http://cygwin.1069669.n5.nabble.com/Cygwin-list-f3.html