Find out how to download and install Microsoft 365 or Office 2019, 2016, or 2013 on your PC or Mac. Follow the steps to sign in, choose your language and bit version, and activate your product.

Learn how to download and install Microsoft 365 apps, like Excel, on your PC or Mac. Follow the instructions in the browser and sign in with your Microsoft 365 account to activate the apps.

Learn how to use the Microsoft Authenticator app or another app of your choice to verify your identity when you sign in to your Microsoft account. Follow the steps to scan a QR code, add your phone number, and get an app password.

Learn how to reset your Microsoft account password if you forgot it or it stopped working. Follow the steps to verify your identity, get a verification code, and create a new password.

Find the right help and support for your Microsoft products, services, and solutions. Sign in to get self-help options, live chat with a specialist, or explore more support resources.

准备好安装了吗？ 在开始之前，请确保电脑或 Mac 满足 系统要求。. 如果你已兑换产品密钥，只需重新安装应用，或者知道你已通过工作或学校分配了许可证，则可以跳到登录部分 ，下载并安装 Microsoft 365 或 Office。 但是，如果是 首次 安装 Microsoft 365 或 Office，可能需要先执行一些步骤。

Learn how to record game clips and capture screenshots on Xbox consoles, Windows 10/11 devices, and mobile devices. Find out the system requirements, settings, and tips for 4K HDR captures.

Learn how to view and delete your Microsoft Edge browsing history stored on your device, across synced devices, and in the cloud. You can also clear Internet Explorer browsing data using Microsoft Edge if your organization has turned on Internet Explorer mode.

Learn how to activate Microsoft 365 or Office using different methods, such as signing in, entering a product key, or using a trial. Troubleshoot activation errors and get help with Microsoft 365 features.

Learn how to download and use the Microsoft Mouse and Keyboard Center app to personalize and customize your devices. Find out which devices are supported and what's new or improved in the latest release.