New Universal Windows Platform (UWP) initiative, Microsoft has built a closed platform-within-a-platform into Windows 10, as the first apparent step towards locking down the consumer PC ecosystem and monopolising app distribution and commerce.

In my view, this is the most aggressive move Microsoft has ever made. While the company has been convicted of violating antitrust law in the past, its wrongful actions were limited to fights with specific competitors and contracts with certain PC manufacturers.

This isn’t like that. Here, Microsoft is moving against the entire PC industry – including consumers (and gamers in particular), software developers such as Epic Games, publishers like EA and Activision, and distributors like Valve and Good Old Games.

Microsoft has launched new PC Windows features exclusively in UWP, and is effectively telling developers you can use these Windows features only if you submit to the control of our locked-down UWP ecosystem. They’re curtailing users’ freedom to install full-featured PC software, and subverting the rights of developers and publishers to maintain a direct relationship with their customers.

The specific problem here is that Microsoft’s shiny new “Universal Windows Platform” is locked down, and by default it’s impossible to download UWP apps from the websites of publishers and developers, to install them, update them, and conduct commerce in them outside of the Windows Store.

http://www.theguardian.com/technology/2016/mar/04/microsoft-monopolise-pc-games-development-epic-games-gears-of-war

Small addition, Microsoft locked down part if you developing for touch devices long time ago, as any unsigned app can't be run.

And yes, watch Capitalist monopolies telling you how all this is the interest of the clients and "not closed".

http://www.theguardian.com/technology/2016/mar/04/gears-of-war-developer-epic-games-tim-sweeney-games-industry-fight-microsoft