No, Windows 10 is not free; it requires a purchase or subscription.
No, Windows 10 is not free; it requires a purchase or subscription.
Windows 10 isn't completely free, but you can access it for free through certain programs. The link you shared is for a PC part picker site, not a direct download. Make sure you follow the guidelines to avoid issues.
Available for a complimentary one-year trial starting from the specified date for those with an authentic copy of W7 or W8/8.1. Beyond that, you must buy it as any other Windows edition.
You should have until July 2016 to switch to Windows 10 at no cost (source: http://www.winbeta.org/news/free-windows...-29th-2016)
Windows 10 remains free with existing licenses for Windows 7, 8, and 8.1. The upgrade isn't necessary since there are no DX12 games available. The advantages of Windows 10 include sending data to improve your service. It's a solid operating system, but I don't think it's worth the change in my view.