The more I look at Cortana, Windows 10s inherent virtual assistant, the more creeped out I get. Cortana collects your every keystroke and spoken syllable. Cortana doesnt stop there: You can use Cortana from the lock screen even when your PC is locked. Microsoft also claims that Windows 10 SP1 is safer than ever, which I find even less assuring than the promise not to exploit all that Cortana data. If youre not comfortable with Cortana collecting contacts, location, calendar data, and text and email content and communication history, you’ll want to do this.”]
Source: https://www.csoonline.com/article/3107251/cortana-the-spy-in-windows-10.html