Welcome back, Windows 10 Microsoft Preview

Technical Preview Windows 10 base on Enterprise system. So many features are turned off. Start button and Metro layout combined on screen. 15 Feb 2015 is Expirement on Product. OS will send your information hardware & App to MicroSoft. Network, IP, USer Name, e-mail, Interest, Keywords on seaching, Tel., SMS, Program compatible, Open/Close App, Spell check for improvement.

Reference :
http://windows.microsoft.com/en-us/windows/preview-privacy-statement