How to use the SUMIFS function in Excel, one of Excel’s math and trig functions, to add arguments that meet multiple criteria.

Using Authenticator as a way to sign in. If you have turned on passwordless, two-step, or multi-factor authentication for your account, use the following steps to sign-in:

Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

See how to find things you've downloaded on your PC.

Experience Microsoft Copilot on windows devices using the Copilot app! The Copilot app helps you get answers and inspiration from across the web, supports creativity and collaboration, and helps you focus on the task at hand.

On your home router. Try these things first to help you fix or narrow down the connection problem. Check the Ethernet cable and connection.Make sure the Ethernet cable is securely plugged into the Ethernet port on both your router and Windows 11 PC.

Provides information for avoiding and reporting Microsoft technical support scams.

Learn how to use Clipchamp to create, edit, and share your own custom videos.

Create an alias to give you an additional email address which uses the same inbox, contact list, and account settings as your primary email address in Outlook.com.

Get to know your way around Windows 11, from where to search to how to stay organized. Watch the video and read tips about new features.