A brand new windows 10 preview build, number 10061, was released yesterday, featuring a number of substantial improvements, and the return of Mail and Calendar, with updated look and feel, plus an array of other refinements.

Windows 10 preview build 10056, was unearthed yesterday from the deep, dark corners of the Internet. The new build, which is of course unofficial, and not supported by Microsoft yet, shows how Windows 10 ‘s interface is heading towards several, substantial, visual improvements.

As of the latest build 10049, which introduced us to Project Spartan, it occurred to many Insiders, that the People app, as well as the Calendar and email client app have suddenly stopped working, due apparently, to an impending update.

Some of the features we expect, are not available yet, and some are not complete, but once Spartan reaches production status, we can expect it to be leaps and bounds ahead of any version of Internet Explorer.