The Microsoft Wireless Display Adapter is a strong, reliable way to project your content, photos, and videos to a big screen.

To find a customer service phone number in your country, please click a region and find your country. Note: Support cases for Surface devices may only be initiated online.

如果你是小型企业所有者. 通过 Microsoft 365 查找构建、运行和发展小型企业所需的信息。. 访问小型企业帮助和学习. 查找有关 Windows 操作系统的帮助和操作方法文章。. 获取对 Windows 的支持，并了解安装、更新、隐私、安全等方面的信息。.

Tip: Learn more about Microsoft Forms or get started right away and create a survey, quiz, or poll. Want more advanced branding, question types, and data analysis? Try Dynamics 365 Customer Voice.

Escolha o idioma e a versão de bits que deseja, e depois selecione Instalar. Agora você está pronto para instalar o Microsoft 365. Selecione a guia abaixo para a versão que está tentando instalar. Office 2019 ou 2016 para PC Office 2016 para Mac Office 2013 para PC.

Learn how to restore files that have been permanently deleted and are no longer in the recycle bin on Windows 10.

Si votre achat d’Office incluait une clé de produit ou Microsoft 365, vous devez entrer votre clé de produit sur l’un des sites web listés ci-dessous pour votre produit. Après avoir saisi votre clé, vous pouvez télécharger et installer Office ou renouveler votre abonnement Microsoft 365.

To check if Windows 11 is ready for your device, go to Start > Settings > Update & Security > Windows Update and select Check for updates. If the upgrade is available for your device and you want to proceed, download and install it. Note: Downloading and installing Windows 11 will most likely take longer than a typical Windows 10 feature update.

COUNTIF function Use COUNTIF, one of the statistical functions, to count the number of cells that meet a criterion; for example, to count the number of times a particular city appears in a customer list.

了解在 Windows 中查找 BitLocker 恢复密钥的不同方法，并了解如何在系统上激活 BitLocker。