And if you don't trust in "free-of-charge-Windows", you can uninstall KB3035583 How to uninstall KB3035583 - The Windows 10 Downloader for Windows 7 and 8.1 - Myce.com
As far as I understand: if you upgrade from Windows 7/8.0/8.1 to Windows 10, it will be free of charge (even there will be some updates later). But this is only for first year. Of course you have to pay for Win 10 when you buy it "fresh" from Media-Markt/Saturn/Amazon, etc..
(Quote from APE)Simple: No. 1: word-of-mouth advertisingNo. 2: offer for free upgrade is only one year.No. 3: if you don't upgrade you will pay a lot of money when you buy OS. No. 4: if you use XP, Vista, OS X or Linux you can't upgrade for free.
(Quote from APE) That's correct, but only in the first year. (Quote from APE) Please note: new pc or laptop will sell incl. Windows 10. So, they will make also profit on this way. In total: Microsoft are not poor or stupid They will make profit even they use this marketing way
In my opinion Windows 10 biggest problem is that you can't deactivate "automatic Updates".If one of updated corrupt you will have a big problem! This is one of the reason why I won't install W10 when available.