Windows 10 is now available for preview. Microsoft announced the availability of a new preview build of Windows 10 Mobile for Windows Insiders. This new update, Build 10512, mostly fixes bugs and makes minor improvements but there’s nevertheless some excitement involved, too, given that Windows 10 is finally available to everyone. Screenshots of this new Windows 10 Mobile build have leaked in recent days. But the leaks haven’t revealed many changes. Indeed, the biggest improvement seems to be in the new capabilities of the Photos app for Windows 10 Mobile.