Everyone are very much excited to get Windows 10 on your system, and even everyone have reserved there copy of the Windows 10, as Microsoft is giving Windows 10 free of cost to Windows 7 and Windows 8 users. Learn how to reserve the copy of Windows 10 from this page.
As Windows 7 and Windows 8 or 8.1 users will be get free upgrade to Windows 10 via Windows Update. To get it just hit the Start key, type "Update," and select "Windows Update" from the list of options.
If you don't like to wait then you can directly grab the ISO file of the Windows 10, and the final Windows 10 build is also available on MSDN for subscribers.
If you don't have Windows 7 or 8 (or 8.1)—if you're finally leaving behind Windows XP—you'll need to buy a licence, which will set you back £99/€135 for the Home edition or £189/€279 for Pro.