Learn how to lock Windows 11 PC remotely with Android phone. The feature requires running the latest Windows Insider Preview build.

To fix the Unknown error trying to lock file in Teams, Excel, OneDrive, PowerPoint, SharePoint, etc, Office apps use these proven solutions.

If you have sensitive data you'd like to keep from prying eyes in a Microsoft Excel file, the easiest way to protect it is with Excel's built-in password tools.

If you’re on a public network, Windows Firewall will protect you and disallow others on the network from connecting to shared files and other services on your laptop.