The Microsoft Services Agreement which covers both Xbox Live and any Windows games published by, has with a new clause aimed at combating piracy. It reads as follows:
"We may automatically check your version of the software and download software updates or configuration changes, including those that prevent you from accessing the Services, playing counterfeit games, or using unauthorized hardware peripheral devices. You may also be required to update the software to continue using the Services."
That essentially seems to mean that Microsoft can disable any first-party games available on thethat appear to have been pirated, as well as any "unauthorized" hardware. This doesn't cover anything not published by the company, and won't affect Steam or other retail platforms, but it does mean that Windows 10 will be keeping an eye on your system to make sure you're not playing counterfeit games.
Thus begins the next round in the everlasting war between software companies and pirates. The new update came into play on August 1.