Microsoft has released official Windows 10 to the world (190 countries) today (Jul 29,2015) which is now available to perform clean installation (In Place) or you can download ISO using tool called media creation tool for both 32bit and 64bit to perform on other computers.If you haven't got notification via windows update about free upgrade(which is 1 year ),you can use this tool to perform windows 10 update (make sure you have internet connection with high speed to download huge data (3GB Plus)).
How do update your existing OS (running windows 7,Windows 8 and windows 8.1 genuine) to Windows 10 ? For more information about product keys ,read the FAQ’s here
The procedure for updating to windows 10 or creation of ISO is only available for Windows 10 Home and Pro Editions.
Download the tool (32bit or 64bit) from https://www.microsoft.com/en-us/software-download/windows10
Double click on the tool ,that you have download,you will see something like below:
If you click on upgrade PC,your OS will be upgraded. If you choose the 2nd option, it will help you to download the ISO file which you can burn to DVD or USB to do the installation at later time or to do on other computers.
Since am already running on windows 10 (as part of insider program upgraded to Windows 10 RTM Build 10240),I choose 2nd option to create ISO ,select the Architecture you want.
Next prompt you to select the media either to USB or ISO file.If you have inserted USB ,you can save the ISO to USB flash drive .I choose 2nd option to save ISO later make it to USB drive or DVD.
Next ,it prompt you to save the ISO file location.
You download will be ready in few minutes or an hour of time (if you have better internet connection) .You can minimize the window and you your PC.
If you are looking to download Windows 10 enterprise edition,you can do so via MSDN Subscription https://msdn.microsoft.com/en-us/subscriptions/downloads/hh442898.aspx.
