It's been a few months since I tried a Windows 8 preview, but from the start screen type "task manager" in the application search context, click the app tile, a

It's been a few months since I tried a Windows 8 preview, but from the start screen type "task manager" in the application search context, click the app tile, and it may or may not be necessary to click "more details" for a more complete view of the running processes. The idea was supposed to be that you wouldn't have to do this yourself as the OS would terminate metro app processes itself if you did not use them for some period of time. EDIT: Apparently this is the long/manual way of doing it.