How do I remove this?

Every time I open any 'metro app' this window pops up and doesn't exit until I close all metro apps. As you can see, it blocks a lot of things making almost any app unusable. Plus it's annoying. How do I turn it off?
The kicker is, when I try and swipe in from the side nothing happens... I don't know who goes around swiping with mice, but there you go, apparently it's a feature.

Every time I open any 'metro app' this window pops up and doesn't exit until I close all metro apps. As you can see, it blocks a lot of things making almost any app unusable. Plus it's annoying. How do I turn it off?
The kicker is, when I try and swipe in from the side nothing happens... I don't know who goes around swiping with mice, but there you go, apparently it's a feature.
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