The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs.

Learn how to type a letter online using Word for the web. Choose a letter template for online letter writing. Edit, send or print your letter online.

How to sign in to Outlook on the web, access your email, contacts, and calendar.

Learn how to locate your Microsoft Office product key, which allows you to activate and use your Office products without requiring a Microsoft account.

If you get an email about unusual activity on your Microsoft account, or if you’re worried that someone else might have used your account, go to the Recent activity page.You’ll see when your Microsoft account was signed in during the last 30 days, along with any device or app-specific info.

You can insert a drop-down list of valid entries (also called a drop-down menu or drop-down box) in Excel to make data entry easier, or to limit entries to certain items that you define.

imap と pop は電子メールにアクセスするための方法です。 imap は、携帯電話、ノート pc、タブレットなど、さまざまなデバイスからメールを確認する必要があるときに推奨される方法です。

Use the People page in Outlook.com to view, create, and edit contacts and contact lists. Create new contacts from scratch, or add someone as a contact from an email message.

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Learn how to concatenate text strings in Excel using the CONCATENATE function. Our step-by-step guide makes it easy to join two or more text strings into one.