Whether your device comes up missing or you've sold it without performing a factory reset, you may wonder what you can do to keep others from using your information. Unfortunately, there isn't a way to reset your Xbox remotely. To keep someone from accessing your profile, games, payment information, and more, head over to the Microsoft Account webpage and change your password. This will prevent anyone else from using your account. You will need to do this for each profile on the Xbox of course. When the individual who has your Xbox turns it on, they'll be asked for a password. Without it, they can't access your profile.