Learn how to download and install Microsoft 365 or Office 2019, 2016, or 2013 on your PC or Mac. Find out how to activate Office, troubleshoot issues, and switch languages or bit versions.

Learn how to download and install Microsoft 365 apps, like Word, Excel, and PowerPoint, 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 scan and repair missing or corrupted system files in Windows using the System File Checker tool (sfc/scannow). Follow the steps to run the tool, view the scan results, and manually replace the corrupted files if needed.

Learn how to access SharePoint, a browser-based app for online collaboration and document management, through your web browser. Find out how to check your subscription, troubleshoot issues, and get training for SharePoint.

Learn how to add, remove, connect, disconnect, and configure user accounts in Windows 10 and Windows 11. User accounts enable each person to have their own settings, documents, and applications on the same device.

Learn how to create a document from scratch or from a template in Word. Find out how to add text, images, art, and videos, and access your documents from OneDrive.

Learn how to use the PC Health Check app or manual steps to see if your device meets the system requirements for Windows 11 after changing your hardware. Find out how the upgrade offer is based on various factors and how to refresh the assessment.

Find solutions to common problems, or get help from a support agent for Microsoft 365, Office, Windows, Xbox, Surface and more. Sign in to get personalized help and access live chat, phone, or email options.

Learn how to download and install Microsoft 365 or Office 2021 on a PC or Mac with a Microsoft account, work or school account, or product key. Find solutions for common installation issues and activation problems.

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。