在更换硬件后重新激活 Windows 11. 使用产品密钥激活 Windows. 产品密钥是由 25 个字符组成的代码，如下所示： 产品密钥：XXXXX-XXXXX-XXXXX-XXXXX-XXXXX. 在安装期间，系统会提示你输入产品密钥。 或者，安装后，若要输入产品密钥，请选择“ 开始 ”按钮，然后选择 “设置 > 系统 > 激活 > 更新产品密钥 > 更改产品密钥。 在“设置”中更改产品密钥. 要查找产品密钥，请参阅“激活方法”中的产品密钥表， “我使用的激活方法是数字许可证还是产品密钥？ 注意: 如果你从 Microsoft 在线商店购买，Microsoft 仅保留产品密钥的记录。

了解如何创建用于安装或重新安装 Windows 7、Windows 8.1 或 Windows 10 的安装介质。.

Microsoft 不建议在不符合 Windows 11 最低系统要求 的设备上安装 Windows 11。. 如果选择在不符合这些要求的设备上安装 Windows 11，并且 认识到并了解风险，则可以创建以下注册表项值并绕过对 TPM 2.0（至少需要 TPM 1.2）和 CPU 系列和模型的检查。. 注册表项： HKEY_LOCAL ...

Virus & threat protection in Windows Security helps you scan for threats on your device. You can also run different types of scans, see the results of your previous virus and threat scans, and get the latest protection offered by Microsoft Defender Antivirus. Under Current threats you can: See any threats currently found on your device.

Find out how to use Game Bar Compact Mode on small screens, handhelds, and when using a controller when playing Xbox games.

解决 Windows 中的蓝屏错误. Windows 11 Windows 10. 如果某个严重问题导致 Windows 意外关闭或重启，则会出现蓝屏错误（有时也称为黑屏错误或终止代码错误）。. 你可能会看到一条消息，指出“Windows 已关闭，以防止损坏你的计算机”或类似消息。. 这些错误可能是由 ...

If you're having problems with Windows 11 on your PC or you want a fresh copy of Windows 11 without the clutter of old files or apps, you can reinstall Windows 11 to try and fix your issues and return your PC to a cleaner state.

Learn how to remove viruses or malware from your Windows PC. Help with the Microsoft account recovery form. Help with account sign in verification codes. How to keep your account safe and secure. Combining Microsoft accounts.

If you receive a message in Windows Security prompting you to update your security processor or TPM firmware, follow the steps in the "Recommended actions" section below. Note: In previous versions of Windows 10, Windows Security is called Windows Defender Security Center.

Activate Microsoft 365 or a non-subscription version of Office. When you start an Microsoft 365 app that's not activated, you'll be prompted to sign in to Microsoft 365. Be sure to sign in using the Microsoft account, or work or school account, that you used to buy or subscribe to Microsoft 365.