You are right. Despite many people (including me) trying very hard, nobody has yet successfully ported Sage to properly to Windows. It's millions of lines of

You are right. Despite many people (including me) trying very hard, nobody has yet successfully ported Sage to properly to Windows. It's millions of lines of code, and difficult to fully port due to many dependencies written by research mathematicians that only support POSIX Unix. Also, I just counted support requests at https://groups.google.com/forum/#!forum/sage-support https://groups.google.com/forum/#!forum/sage-support for this month (Feb 2016) and nearly half of them are problems installing Sage. (Disclaimer: I wrote the above blog post.)