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

Learn how to view your PC information on Windows with Microsoft Support's step-by-step guide.

Hotmail is now Outlook.com. Learn how to sign in to access your Outlook.com, Hotmail, Live, or MSN email account.

Learn how to contact Microsoft Store support to get help for your payment and billing issue.

Get the steps for showing your favorites bar in Microsoft Edge and Internet Explorer 11.

Find answers to frequently asked questions about Office 2021 and Office LTSC for Windows and Mac on the official support page.

PC で実行している Windows オペレーティング システムのバージョンとデバイスの仕様を確認する方法をご覧ください。

Learn how to add an app to run automatically at startup. Select the Start button and scroll to find the app you want to run at startup.

Learn how to recover deleted items, such as email, contacts, calendar appointments, and tasks in Outlook.

If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product.