that's a crying shame - the world needs a secure-by-default and easy-to-use crypto library. Someday...
I just looked at NaCL. It only works if both sides use it, but data at rest isn't the big problem. Servers are.
And this doesn't work if you want to make a replacement for ssh.
I don't see anything in a Github repo to support this, not with the Microsoft tools. Perhaps it builds under Cygwin and similar, but that's hardly qualifies as "builds on Windows" for practical purposes.
https://github.com/jedisct1/libsodium/tree/master/dist-build
The end result on Windows is a native DLL library.