How to Lock a Windows 10 User Account. When you lock a user account, you're taken to the login screen, where you'll need to select a user to sign back in.

To lock Facebook profile here is a step-by-step guide 1. First, you will need to update your Facebook app by heading over to the Google Play Store or Apple App store.

Now for privacy. There are settings in Facebook that allow you to ensure your account is only visible to friends, or even certain friends. It’s as simple as going through these one by one.

Friends, friends of friends, advertisers; keeping track of Facebook's privacy settings can get confusing. Here's how to get yours just right.