The media creation tool can be used to upgrade your current PC to Windows 10 or to create a USB or DVD and install Windows 10 on a different PC.
Here’s a quick look at the steps to get Windows 10 installed on your PC using this tool.
Download the tool
Find the media creation tool on the Software download page.
There are two versions of the tool, one for a “32-bit operating system” and one for a “64-bit operating system.” To find out which you have, go to Start, type Control panel, select System and security, and then, under System, look at the value for System type:.
If your PC is a 32-bit operating system, on the Software download page, select Download tool now (32-bit version). If your PC is a 64-bit operating system, select Download tool now (64-bit version).
When you're asked, select Run (or choose to Save the tool if you don't want to run it now).
Full Miscrosoft Article
http://go.microsoft.com/fwlink/p/?LinkId=616447