Digital signatures and certificates | Microsoft Support
Certificate authority (CA) A certificate authority is an entity similar to a notary public. It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired. Top of Page Digital signature assurances The following terms and definitions show what assurances are provided by digital signatures. Authenticity The signer is ...
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, Excel 2024, PowerPoint 2024, Access 2024, Excel 2021, Word 2021, PowerPoint 2021, Access 2021, Visio Professional 2021, Visio Standard 2021, Excel 2019, Word 2019, PowerPoint 2019, Access 2019, Visio Professional 2019, Visio Standard 2019, Excel 2016, Word 2016, PowerPoint 2016, Access 2016, Visio Professional 2016, Visio Standard 2016
Windows 安全启动证书过期和 CA 更新 | Microsoft Support
Microsoft已颁发更新的证书，以确保 Windows 设备上的安全启动保护的连续性。 Microsoft将在大部分 Windows 设备上管理这些新证书的更新过程。 此外，我们还将为管理自己的设备更新的组织提供详细的指导。 行动号召 可能需要采取措施来确保 Windows 设备在 2026 年证书过期时保持安全。 UEFI 安全启动 DB 和 ...
Stav služby XBOX | XBOX Support - support.xbox.com
Zkontrolujte, jestli u služeb, her a aplikací XBOX nedochází k výpadkům.
Stato XBOX | XBOX Support
Controlla i servizi, i giochi e le app di XBOX per qualsiasi interruzioni di servizio.
XBOX Update Preview Release Notes | XBOX Support
Hey XBOX Insiders! We are releasing a new XBOX Update Preview to the Beta ring today. Continue reading below to learn all about what's included with this update.
查找你的 Windows 产品密钥 | Microsoft Support
了解如何查找用于激活的 Windows 产品密钥，以及何时改用数字许可证。
Applies To:
Microsoft account dashboard
Verwalten der Einstellungen für Barrierefreiheit in Gears of War: E-Day
Für diejenigen, die ihr Spielerlebnis in Gears of War: E-Day anpassen möchten, gibt es eine Vielzahl von Barrierefreiheitsfunktionen, die Sie über die Settimgs > Menü "Barrierefreiheit " sowie einige der anderen Optionen.
Protect yourself from phishing | Microsoft Support
Phishing (pronounced: fishing) is an attack that attempts to steal your money, or your identity, by getting you to reveal personal information -- such as credit card numbers, bank information, or passwords -- on websites that pretend to be legitimate. Cybercriminals typically pretend to be reputable companies, friends, or acquaintances in a fake message, which contains a link to a phishing ...
Microsoft 支持 | Microsoft Support
Microsoft 支持可帮助你处理 Microsoft 产品的问题。 查找有关 Microsoft Copilot、Microsoft 365、Windows 11、Surface 等的操作方法文章、视频和培训。
July 14, 2026—KB5101650 (OS Builds 26200.8875 and 26100.8875)
Improvements This update includes new features and quality improvements that were part of the following update: June 9, 2026—KB5094126 (OS Builds 26200.8655 and 26100.8655) June 23, 2026—KB5095093 (OS Builds 26200.8736 and 26100.8736) Preview This update addresses security vulnerabilities documented in the following guide: July 2026 Security Updates The following summary outlines key ...