Microsoft released Windows 10 Technical Preview Build 9926 to Windows Insiders. Follow this post and install Windows 10 Technical Preview January Build 9926 on your PC
If you are on the brand new build of the Windows 10 January Technical Preview, follow the guide to Enable Hey Cortana on Windows 10 Preview and other stuffs
If you have Galaxy Nexus I9250 and you still on Android Kitkat, this article will help you to install Android Lollipop based CM 12 ROM on Galaxy Nexus I9250
If you are interested in rooting your Xperia smartphone, follow the steps mentioned here, will help you Root Sony Xperia Z3 Compact With CWM Recovery.