Learn how to download and install or reinstall Office 2019, Office 2016, or Office 2013 on your PC or Mac. Find out how to activate Microsoft 365, troubleshoot issues, and customize your installation options.

Learn how to mirror or project another device's screen to your Windows PC using Miracast. Follow the steps for Windows 11 or Windows 10 to install the Wireless Display app and connect to a TV, projector, or other display.

Learn how to use the PC Health Check app to check your device health, performance, and Windows 11 eligibility. Find out how to install, update, and troubleshoot the app from Microsoft Support.

Learn how codecs let you play different formats of audio and video files in Media Player. Find out which codecs are included with Windows and which ones you can install from the Microsoft Store.

Learn how to create and use app passwords for devices that don't support two-step verification. App passwords are long, randomly generated passwords that you provide only once instead of your regular Microsoft account password.

Learn how to download and install Microsoft 365 or Office 2021 on your device, whether you have a Microsoft account, a work or school account, or a product key. Find out how to activate the apps, troubleshoot issues, and get support.

Learn how to adjust the number of times per second that the image refreshes on your monitor screen. Find out the benefits of changing the refresh rate for gaming, browsing, inking and battery life, and how to use Dynamic Refresh Rate (DRR) feature.

Learn how to check and enable TPM 2.0, a security feature required for Windows 11, on your PC via UEFI BIOS (firmware) settings. Find links to PC manufacturer's support information and other Windows 11 system requirements.

如果这是你第一次安装 Microsoft 365，则可能需要先执行一些设置步骤。展开下面的 “了解详细信息”部分。 但是如果是重新安装 Microsoft 365，且已兑换了产品密钥并拥有与 Microsoft 365 相关联的帐户，请转到“登录并安装 Office”的部分。

Aprenda a entrar no Hotmail, que agora é Outlook.com, com seu nome de usuário e senha da conta Microsoft. Veja também como resolver problemas de entrada, criar uma nova conta e obter ajuda com o Outlook.com.