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

Learn how to download and install Microsoft 365 apps like Word, Excel, Teams, 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 view, install, and change settings for add-ins that enhance your productivity in Excel, PowerPoint, and Word. 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.

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。

Learn how to use the Microsoft Authenticator app or another app of your choice as a two-step verification method for your work or school account. Follow the steps to scan a QR code, add your phone number, and get an app password.

Learn how to use VLOOKUP, HLOOKUP, INDEX and MATCH to look up values in Excel tables. See examples, tips and limitations of each function, and how to use the new XLOOKUP and XMATCH functions.

Learn how to recover your Microsoft account password if you know your username but not your password. Follow the steps to verify your identity, get a verification code, and create a new password.

Learn how to use the XLOOKUP function to find things in a table or range by row, with examples and syntax. XLOOKUP can return the first match, the closest match, or a nested result, depending on the arguments you specify.

Learn how to add, remove, connect, and disconnect user accounts in Windows 10 and Windows 11. User accounts let each person have their own settings, documents, and applications, and can help with security and privacy.