Learn how to uninstall or remove apps and programs in Windows 10 or 11 using different methods. Find tips and troubleshooters for common issues and errors.

If you recently modified your device hardware and want to upgrade to Windows 11, you need to see if your device meets the system requirements. Learn how to use the PC Health Check app or manually refresh the eligibility assessment in Settings.

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.

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 prepare your device, transfer your files, and install Windows 11. Find out if your PC meets the minimum system requirements and explore the new features and apps on Windows 11.

Learn how to view, install, and change settings for add-ins that enhance Microsoft 365 programs with custom commands and features. Find out how to deal with add-in security, compatibility, and device access issues.

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 recover files or folders from the OneDrive recycle bin, either online or from your computer. Find out how long deleted items are kept in the recycle bin and how to access them.

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 with a Microsoft specialist.

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。