激活是一个技术过程，用于将产品密钥或数字权利与设备的硬件配置配对。 这不评估副本本身的真实性，也不保证 Windows 副本 ...

This cumulative update for Windows 11, version 25H2 and 24H2 (KB5083769), includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained ...

Learn how to install Office 2021, 2019, or 2016 on your PC or Mac.

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

Xbox Support ... Xbox Support

Find out how to submit a request for a refund for a purchase of digital Xbox content.

Using Authenticator as a way to sign in If you have turned on passwordless, two-step, or multi-factor authentication for your account, use the following steps to sign-in: Go to the site where you want to sign in. Enter your username at the sign-in prompt and select Next. Select Send notification.

Find out how to submit a case review and learn more about your Xbox enforcements.