Windows 10 is finally out now and has already started to raise quite a lot of privacy concerns, the latest one is the updated "Services Terms Agreement" which states that Microsoft can prevent the user from playing counterfeit games and even disable unauthorized hardware. The agreement is applicable to all Microsoft services like Office 365, Outlook.com, Xbox Live, Skype, OneDrive, Bing and MSN. Also software using a Microsoft account is covered by the terms meaning the terms also affect most Windows 10 users.
While Microsoft could have done this with existing setup on older Windows OS's by delivering the kill-switch via "Windows Update" and which they have already done in the past with KB971033 to disable 70+ Windows Activation Hacks, but they have now made it explicitly clear and include other software's and games which could have some serious consequences. In the terms the company states it might, “download software updates or configuration changes, including those that prevent you from accessing the Services, playing counterfeit games, or using unauthorized hardware peripheral devices.” It should also be noted that no longer Windows 10 updates are optional.