Windows 10 is finally available and is being rolling out to PCs across the world. You can now upgrade for free if you have Windows 7 or Windows 8.1 on your existing PC with automatic updates on. Just click on the shiny new Windows 10 icon on the notification area of the taskbar, follow the steps and Microsoft will alert you once it's ready to be installed. If you can't see the new icon on your system tray area then you need to install all the available updates for your copy of Windows 7 or 8.
If you need an ISO of Windows 10, then click here. You will find Media Creation Tool on this link which has an option to convert the installation files to ISO file format for both Windows 10 Home and Pro.