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.

Important: Steps may be different between new and classic Outlook for Windows. To determine which version of Outlook you're using, look for File on the ribbon.If there's no File option, follow the steps under the New Outlook tab. If the File option appears, select the tab for Classic Outlook.

Microsoft Edge を使用すると、Web を参照するときにパスワードを簡単に保存できます。 デスクトップまたはモバイル デバイスの Edge ブラウザーで新しいパスワードを入力すると、ユーザー名とパスワードを記憶するかどうかを Microsoft Edge から確認するメッセージが表示されます。

Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.

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

Most tools and options in Microsoft Edge are available when you select Settings and more > Settings.

Learn how to use function VLOOKUP in Excel to find data in a table or range by row. Our step-by-step guide makes vlookup in excel easy and efficient.

Learn how to restore files that have been permanently deleted and are no longer in the recycle bin on Windows 10.

Discover how to effectively utilize your computer keyboard and master various keyboard shortcuts for efficient computing.

Learn how to connect to a Wi-fi network in Windows and manage your current network connections.