Review privacy settings
For overall system settings, pull out the Charms bar from the right side of the screen and click Settings. At the very bottom of the Settings window you'll see a text link that reads "Change PC settings."
Click that, and you'll be taken to a full-page view of various system settings. Seventh from the top of the list of sub-categories is Privacy. Tapping that allows you to allow or deny apps access to your geolocation data, share URL data from downloaded apps, and other settings. (Yes, it took a lot of taps to get there, didn't it?)