Get in touch with Microsoft Support for assistance with Microsoft products and services.

Learn how to reinstall Windows on your PC and how activation works after it's installed.

It's easy to attach pictures, files, and other items to your Outlook messages. Outlook keeps track of the documents you’ve recently worked on, whether they're stored on your computer or saved in OneDrive (cloud only).

Open a document that has comments. If the comments option doesn't show immediately, go to Review > Show Markup, and select only Comments from the list. You can choose to print comments from one specific reviewer by selecting the reviewer under Specific people.

The Microsoft Mouse and Keyboard Center is an app that helps you make the most out of your Microsoft keyboard and mouse. Mouse and Keyboard Center helps you personalize and customize how you work on your PC.

How to recall and/or replace an email message you sent by using Microsoft 365 and your built-in Exchange Server account.

Microsoft Teams をダウンロードする方法について説明します。 Microsoft 365 で Microsoft Teams を入手するか、無料バージョンの Teams をダウンロードしてください。

To change startup behavior, select Start, home, and new tabs, and then select what you want Microsoft Edge to display on startup.

Learn how to personalize a Windows lock screen with a background photo, slideshow, or app notifications.

How to freeze panes in Excel to keep rows or columns in your worksheet visible while you scroll, or lock them in place to create multiple worksheet areas.