Headlines Most Activated Windows Resourceen leak of Skype Universal messaging experience for Windows 10 Mobile we patiently wait for Microsoft to roll out a beta version of their unified Skype messaging experience "before the end of the summer", a Russian website has managed to get a hold of what looks like the new Skype unified experience for Windows 10 Mobile. Windows 10 installed on 75 million devices after just a month of availability free upgrade from Windows 7 and 8 to Windows 10 is doing wonders: In just under a month of general availability, Windows 10 is now running on 75 million devices.