The Cygwin DLL currently works with all recent, commercially released x86_64 versions of Windows, starting with Windows Vista. For more information see the FAQ.

Cygwin version

The most recent version of the Cygwin DLL is 3.1.6.

Installing Cygwin

Install Cygwin by running setup-x86_64.exe

Use the setup program to perform a fresh install or to update an existing installation.

Keep in mind that individual packages in the distribution are updated separately from the DLL so the Cygwin DLL version is not useful as a general Cygwin distribution release number.

Support for Cygwin

For all Cygwin-related questions and observations, please check the resources available at this site, such as the FAQ, the User's Guide and the mailing list archives. If you've exhausted these resources then please send email to an appropriate mailing list. This includes observations about web pages, setup questions, questions about where to find things, questions about why things are done a certain way, questions about the color preferences of Cygwin developers, questions about the meaning of the number 42, etc.

Please send notification of technical problems (bad html, broken links) concerning these web pages to the Cygwin mailing list.

Please do not send personal email with "quick questions" to individual Cygwin contributors. The Cygwin mailing lists are the places for all questions. Really. I mean it.

32 bit Cygwin

Address space is a very limiting factor for Cygwin. These days, a full 32 bit Cygwin distro is not feasible anymore, and will in all likelihood fail in random places due to an issue with the fork(2) system call.

Therefore we recommend using 32 bit Cygwin only in limited scenarios, with only a minimum of necessary packages installed, and only if there's no way to run 64 bit Cygwin instead.

You have been warned. If you're still sure you really need a 32 bit Cygwin, and there's absolutely no way around it, you may run the setup-x86.exe installer.