Google may not have a Google Play Music account for the Windows Store but there is a great 3rd party app filling the void. gMusicW is a free app that enables streaming and download from Google Play Music and the app has just been updated. The new version fixes an issue where playback would be interrupted with a message “is using on another device” and has streaming stability improvements.
If you use Google Play Music and have a Windows 8.1 device you should checkout this app, the ad support version is free and there is a $1.99 version that removes the app. More details in the Windows Store.
01/13/2014 – Version 2.2.14
[b] Stability improvements: streaming.