Before installing the update (formerly known as Blue) in your primarily PC, I highly recommend to read my previous article How to upgrade Windows 8 to Preview, to Windows 8.1 RTM, because upgrading to the Preview will have some consequences later on when the time comes to install Windows 8.1 RTM. Download ISO For all the languages, check

SEE ALSO: Microsoft demos Windows 8.1 devices, apps, and a new Windows Store

BUILD keynote live stream info

If you are planning to watch BUILD today, Microsoft will be streaming live the keynote at 9am PDT on Also follow the #bldwin hashtag on Twitter to be up to date on all the information about Windows 8.1 Milestone Preview and related topics such as Windows Server, Windows Azure, Visual Studio and more. Which features are you looking for the most in Windows 8.1? All content on this site is provided with no warranties, express or implied. Use any information at your own risk. Always backup of your device and files before making any changes. Privacy policy info.