If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track. Run the System File Checker tool (SFC.exe)

If you recently made any changes to your hardware and want to see if your computer now meets the requirements for Windows 11, the easiest way to do that is with the PC Health Check app: If you haven't yet, install the PC Health Check app here.

Some Office 2019, Office 2016, and Office 2013 products come with a product key. If yours did, before installing Microsoft 365 for the first time, sign in with an existing or new Microsoft account and enter your product key at office.com/setup. Redeeming your key is what links your account with Microsoft 365 so you only have to do this once.

If you're looking for Help on specific Excel Add-ins, such as Solver or Inquire, see Help for Excel for Windows add-ins. If you're looking for additional help with Excel add-ins using the COM Add-ins dialog box, see Add or remove add-ins in Excel. Get a Microsoft 365 Add-in for Excel.

下载并安装或重新安装 Office 2019、Office 2016 或 Office 2013. 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 ...

如果Microsoft 365 应用程序（如 Word 或 Excel）无法正常工作，有时重启会解决问题。. 如果这不起作用，你可以尝试修复它。. 完成后，你可能需要重新启动计算机。. Windows 10 Windows 11. 访问修复工具的步骤因操作系统的不同而异。. 右键单击左下角) (“开始” 按钮 ...

The enablement package is a great option for installing a scoped feature update like Windows 10, version 20H2 as it enables an update from version 2004 to version 20H2 with a single restart, reducing update downtime. This enables devices to take advantage of new features now.

Windows 11 in S mode is designed for security and performance, exclusively running apps from the Microsoft Store. If you want to install an app that isn't available in the Microsoft Store, you'll need to switch out of S mode. Windows 11 in S mode is only available in the Windows 11 Home edition.

Help for admins of small businesses. Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

要在新设备上使用 Microsoft 365，则可以将 Microsoft 365 激活为 Microsoft 365 家庭版 的 1 个月试用版。. 还可以购买 Microsoft 365 或非订阅版本的 Office，将 Microsoft 365 添加到现有 Microsoft 365 订阅，或从新产品密钥卡输入产品密钥。. 如果你有一个较旧的非订阅版本的 Office ...