Learn how to personalize a Windows lock screen with a background photo, slideshow, or app notifications.

Learn how to find your BitLocker recovery key in Windows.

Learn how to unlock your Microsoft account and resolve 'account has been locked' error message.

How to lock cells in Excel to protect your data. You can also unlock a range of cells and grant permissions to others to edit.

Locking your Windows device allows you to quickly secure your device while keeping your applications and files open in the background. When you lock your device, anyone trying to …

Discover the step-by-step process to change or reset your Windows password if you've lost or forgotten it. This guide will help you regain access to your Windows account quickly and securely.

Go to File > Info > Protect Document > Encrypt with Password. Type a password, press OK, type it again and press OK to confirm it. Save the file to make sure the password takes effect. …

Learn about BitLocker Drive Encryption in Windows and how to encrypt drives.

Click on Protect Workbook and select the Always Open Read-Only. You can easily lock or unlock Excel files on your Mac.

Microsoft 365 includes a file protection feature that allows authors to mark a file as Final. This locks the file, preventing any further editing. You can easily turn off this feature in the Microsoft …

Dynamic lock is a security feature that automatically locks your device when you are not around. It uses Bluetooth to pair with a phone, and locks the device when the Bluetooth signal drops …