Many thanks to @anon47418038 for providing us a ZCash node for Windows. The ZCash Desktop GUI Wallet is also ready and works on Windows:
A detailed Windows installation procedure exists on the GitHub site of the ZCash Desktop GUI Wallet.
In case of problems users are encouraged to report bugs on the issues page.
DISCLAIMER: ZCash and the GUI wallet for Windows are currently experimental. Have fun but use them with caution