Cortana along with other Microsoft services, such as Bing, use your recent searches and history to customize their search recommendations for you in Windows 10. If you do not want that personal data stored in your Microsoft account, you can clear it in a handful of steps.

1. Navigate to https://www.bing.com/account/personalization inside your browser.

2. Sign in with your Microsoft account if prompted.

3. Click the Clear button under "Interests" to delete your saved favorites and interests for Bing, MSN, and Cortana. Interests include news topics, weather, finance, and flights you've put into your Microsoft account, for instance, with interest tiles around the Bing homepage.

4. Click Clear to verify your choice.

5. Click the Clear button under "Other Cortana Data and Personalized Speech, Inking and Typing." This will pay off the info saved out of your calendar, contacts, location, and browsing history.

6. Again, click Clear to verify.

7. Stick to the other links on the page to pay off or manage additional saved info, such as your saved places in Bing Maps, Bing search history, and saved info for Xbox, OneDrive, Outlook, and Microsoft Advertising.

Observe that whenever you clear the personal info, Cortana along with other Microsoft services could be more limited in providing you personalized recommendations. You will also need to head back to the personalization page again after while using services to eradicate any new info saved to your Microsoft account.