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

If you can't sign into your Microsoft account, use the sign-in helper to identify the problem. How to use the Microsoft account sign-in helper The tool will ask you to enter the email address or mobile phone number you're trying to sign in with and check the details you provide. If it detects a problem with your account, we'll tell you what you need to do to solve the problem. If the tool ...

Find solutions for Xbox account and profile issues, manage settings, and get support for your Xbox experience.

Need help with an Xbox console, an Xbox game, or Xbox network? Find out how to get in touch with us.

Microsoft will never proactively reach out to you to provide unsolicited PC or technical support. If you receive a phone call claiming to be from Microsoft, or see a pop-up window on your PC with a fake warning message and a phone number to call and get your "issue" fixed, it's better to be safe and not click any links or provide any personal information.

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

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 two methods to which you can activate your product: Online via the internet, and by using the Product Activation Portal. Online: When you begin activation, Windows will try to use your internet connection to activate online. If you have ...

更详细地了解通知你关于 Xbox 强制措施的不同方式以及你可以在哪里获取相关详细信息。

Microsoft 已發布更新憑證，以確保 Windows 裝置安全開機保護的連續性。 Microsoft 將負責這些新憑證在相當大範圍 Windows 裝置上的更新流程。 此外，我們也會為自行管理裝置更新的組織提供詳細指引。 行動信號 你可能需要採取行動，確保 Windows 裝置在 2026 年憑證到期時依然安全。 UEFI 安全啟動資料庫與 ...

了解如何註冊您的 Xbox 產品，以便您要求和追蹤維修服務、查看您的保固服務，以及購買延長保修計劃。 還有取消註冊和取消 ...