With some Microsoft operating systems such as Microsoft Windows NT you must re-apply the latest service pack after you make a change to your computer. Although you do not have to do so in Windows...
Giveaway: Win the Logitech G910 Orion Spark mechanical keyboard!
Six Windows 10 features not available to Insiders... yet
All the latest on Windows 10 build 10041
windows 10 technical preview
Microsoft wants to turn Android phones into Windows 10 phones
LG Windows Phone mock-up
How to get Cortana working outside of the US in preview build 10041