Kivy and its modules install fine using Kivy with me. The issues I had were setting up the correct path variables in Windows.
You need Python\Scripts and Python in your Windows path like so:
C:\Python34\Scripts;C:\Python34;
Please note, another issue you might run into is if you have two different version of Python on your machine. You might already have an older versions of python and not realize it, which can make setting it up difficult.
I had to take Python 2.7 out of my path, and Windows seems to only want one version in it's path at a time, from my limited experience.
Work Firewalls (obvious but some people still report troubles for installing due to this when its not a python issue or Kivy issue, just a work environment)
depending on your work environment (I assume anyone working with Windows is doing it because they have to due to work environments) you will need to potentially (with sys admin approval of course) install by bypassing a firewall.
I work at an extremely locked down secure environment and the only issues I had installing Kivy and its modules were working with my IT department to work with security protocols and firewalls, and I'm running Windows 7 even.
I highly recommend Kivy for desktop only based Apps and it renders some beautiful phone apps as well. I am looking into electron for desktop apps too, but I did alot of research on this and Kivy is a really good option even over qt in my opinion.
The only issue I have is its lack of ability to do node based plotting. It's more of a physics engine based environment and good for Dashboard settings and real time chronological plotting, music apps, interactive games as it has an embedded webgl library and touchscreen binding events.
There is a matplotlib module but honestly who wants a screen shot of a matlab plot in Kivy?
You can install NetworkX with WebGL but it is outdated for Python 3.4
On my long list of todos is getting a node based graphing module wrapped for Kivy.
if you will be continuing to develop in Kivy, I highly recommend r/kivy. It's moderators are alive, well and responsive and it is a good community for Kivy dev.