Learn how to find a Windows product key for activation, and when you'll use a digital license instead.

了解如何在电脑上安装 Office 2013 或 Office for Mac 2011。

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

Keeping your login information secure will sometimes require you to change a password. You can easily edit the passwords saved in Microsoft Edge.

Download the latest Windows update from the Windows Update page in Settings for your device when it becomes available.

Protect your Android, iPhone, Mac, and Windows devices from threats by installing Microsoft Defender. Download Microsoft Defender on your devices either by:

Learn how to upgrade from Windows 10 Home to Windows 10 Pro or Windows 11 Home to Windows 11 Pro, including how to use a valid product key or the Microsoft Store.

Learn how to install Office 2013 on your PC or Office for Mac 2011.

Hotmail est maintenant Outlook.com. Découvrez comment vous connecter pour accéder à votre compte de messagerie Outlook.com, Hotmail, Live ou MSN.

This article is for Outlook.com. If you're using Outlook for Windows, see Fixes or workarounds for recent issues in Outlook for Windows.. If you're having problems accessing Outlook.com, you can see the status of Microsoft Office Online Services at the Service Health portal.. If you're having problems sending or receiving email, read how to Fix Outlook.com email sync issues.