If Windows came preinstalled on your PC, the product key should appear on a sticker on your device. If you’ve lost or can’t find the product key, contact the manufacturer. To ensure your product key is genuine, see How to tell your software is genuine and How to tell your hardware is genuine.

Updates keep your Surface performing its best. Along with software updates for Windows 10 or Windows 11, it's important to make hardware updates, also known as updates for drivers and firmware. You can quickly check the health of your Surface drivers and firmware using the Surface app. Open the Surface app.

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

Receive Remote Assistance Support from Microsoft. Remote Assistance Support from Microsoft allows a Microsoft support professional in another location to view your computer screen and work on your computer over a secured connection. Protect yourself from tech support scams. Before clicking 'I accept', review the: Agreement for Microsoft Services.

Activation helps verify that your copy of Windows is genuine and hasn’t been used on more devices than the Microsoft Software License Terms allow. There are three methods to which you can activate your product: Online via the internet, by telephone using our automated systems, and by a live support advocate.

感谢您选择 Microsoft 365 消费者订购服务！. 您使用 Microsoft 365 消费者订购服务和软件的行为适用您在注册微软 帐户 （ 链接见 下）时同意的 Microsoft 服务协议的条款和条件以及本补充和修订协议的条款和条件（统称为 “协议”）, 上述协议与本补充和修订协议中列出的网站链接中包含的其他条款（如 ...

您可以通过登录到你的帐户随时取消 Game Pass Ultimate 订阅。. 在“Xbox Game Pass Ultimate”下，选择“管理”，然后选择“取消”。. 可以选择在到期日期结束订阅。. 根据订阅状态，你也可以选择立即结束，我们将仅退还你为 Ultimate 支付的费用。. 登录到“服务和订阅 ...

Learn how to run Windows Update Troubleshooter to resolve errors downloading or installing Windows updates.

获取你所使用语言的 Xbox 主机和所有 Xbox 附件的手册。

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