Turn off Getting To Know You in Windows 10
You can turn the Speech, inking, and typing setting also called as Getting to know you feature On or Off via Settings. To disable this feature, open Settings > Privacy > Speech, inking & typing. Here click on the Stop getting to know me button – and then Turn off. When you do this, Windows 10 will turn off diction and Cortana and also clear information on your device that Windows uses to give you a better experience. To turn it on again, click on the Get to know me button. If you have privacy concerns, you may want to turn off this feature. Additionally, you may turn the Send Microsoft info about how I write setting on or off in Settings > General. There are also a few other Windows 10 Privacy Settings, you may want to take a look at. Our freeware Ultimate Windows Tweaker 4 for Windows 10, too offers some excellent tweaks to harden your privacy settings. Read: Windows 10 Privacy Issues: How much data is Microsoft really collecting?
How do I make Windows completely private?
While you cannot do it 100%, you can still control it to a great level. Go to Settings > Privacy & Security, and turn off features such as ad tracking, location tracking, timeline, Cortana, switch to a local account, disable diagnostic data collection, and use Microsoft’s Privacy Dashboard to control things.