Markoz wrote on Jul 12^th, 2015 at 3:11am:

So what if you buy Windows 10, instead of accepting the Free Upgrade? Wouldn't that be the same deal? After all, Windows 10 is Windows 10. :-/

Purchasing a license will negate any of the aforementioned issues. You can turn off updates, roll them back, and have the option to opt out of any Apps or software MS offers via the SP's.

However, a important issue to to contemplate is the fact that Windows is no longer a OS Platform, it's a service. The biggest concern is this: while Windows 10 will seamlessly upgrade to Windows, your OS would evolve into a new product for which you have to pay. And by pay I mean it is going to be/already is a subscription based service.

I suggest you read the ToS regarding Win10.