My main website for my various zcash projects is at https://zcash.mercerweiss.com. Major projects have (or WILL have, as with Windows), their own sites, and I'll most certainly be posting here when my Windows release is ready with a pointer to its URL.
I see an all-GUI, easy to install Zcash on Windows as kind of the Holy Grail right now, and have been putting most of my time into that right now. At the moment I'm in tough financial straights (dental bills combined with my sole current consulting project having....non-technical difficulties), so even a tiny donation would help the cause a LOT (I"m down to ~US$30...donation methods are listed on my site linked above).
With any luck I'll be able to track down the platform-specific issue(s) that are keeping private transactions to verify on Windows within the next week.