Learn how to tell if your Office software is genuine. To help determine if your Microsoft software is genuine, go to our How to Tell site for more information. Here you'll learn about authentic packaging, including what to look for with product key labels, and Certificate of Authenticity (COA), how to report counterfeit software, and find out what your shopping and licensing options are.

向文档添加图片水印。 按“提交”即表示你的反馈将用于改进 Microsoft 产品和服务。

使用 Microsoft 帐户登录到 Microsoft 服务，如 Windows、Microsoft 365、OneDrive、Skype、Outlook 和 Xbox Live。

If your camera is unable to capture the QR code, you can manually add your account information to the Microsoft Authenticator app for two-factor verification.

Scopri come aggiornare i driver in Windows usando Gestione dispositivi per aggiornare o reinstallare un driver.

在 Windows 11 中，必须将 Microsoft 帐户与设备上的 Windows 11 数字许可证联系起来。 通过将 Microsoft 帐户与数字许可证链接起来，即可在进行重大硬件更改时使用激活疑难解答程序重新激活 Windows。

找出 Surface 设备的电源型号—包括电源型号、功率和瓦特数以及 USB 充电端口。 选择 Surface 设备型号

了解如何将现有设备升级为Windows 10或购买新电脑。 获取有关升级到Windows 10的常见问题的解答。

Analyze and store large amounts of information, and manage data more efficiently with Access database templates available for download.

升级不同于更新，因为它会将电脑从上一版本的 Windows（如 Windows 10）升级到 Windows 11。 本常见问题解答旨在解决有关升级到 Windows 11 的问题。