How to use the COUNTIF function in Excel to count the number of cells that meet values you set.

Learn how to add a printer or scanner in Windows. If your printer connects by a wire, plug it into your device. It'll connect automatically, your PC will download the right drivers, and you can use it right away.

System requirements and setup steps for the Phone Link app

How to use the COUNT function in Excel to count the number of cells that contain numbers, and to count numbers within a list of arguments.

Set up the Microsoft Authenticator app from the Security info page. Depending on your organization’s settings, you might be able to use an authentication app as one of your security info methods.

Learn how to reset your PIN if you aren't signed in to Windows and having trouble using your PIN.

Change your screen saver settings. Select the Start button, then go to Settings > Personalization > Lock screen, and select Screen saver settings.In the Screen Saver Settings window, choose a screen saver from the drop-down list.

Contact Microsoft Office Support for assistance with Microsoft 365, Office, Windows, Xbox, Surface products and more.

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Find out how to stop Windows Security from alerting you about or blocking a trusted file, file type, or process, by adding it to the exclusions list.