That is a feature, not a bug. I wish I could find something that would break windows trusted installer from using 25% of my CPU all the time on win 7.
http://www.howtogeek.com/194993/the-windows-store-is-a-cessp...
http://www.itproportal.com/2015/02/23/windows-store-infested...
http://www.zdnet.com/article/how-was-this-windows-store-app-...
They have gotten better (these links are in chronological order), but best practices for individual users and administrators is to disable the windows app store.
That is a feature, not a bug. I wish I could find something that would break windows trusted installer from using 25% of my CPU all the time on win 7.