Amazon's voice assistant Alexa is now available for all Windows 10 devices via the Microsoft Store. The Alexa app offers almost all features of the assistant but does miss out on some features such as Spotify integration. Alexa is also slated to get PC-specific capabilities in early 2019.
https://www.notebookcheck.net/Amazon-Alexa-can-now-be-downloaded-from-the-Microsoft-Store-for-all-Windows-10-devices.358006.0.html