This module implements auto-updater logic for OS X on Windows.
Installation:
npm install electron-windows-updater
This is how you can use it:
const autoUpdater = require(process.platform == 'win32' ? 'electron-windows-updater' : 'auto-updater')
Everything (should) work like on OS X: http://electron.atom.io/docs/v0.34.0/api/auto-updater/
It is very alpha, it was written in a couple of hours and it doesn't implement cool security™ features like signature checking and so on (yet) and was only tested on two machines running Windows 8.1 and Windows 10.