Sign in to Microsoft 365 | Microsoft Support
Learn how to sign in to Office or Microsoft 365 from a desktop application or your web browser.
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, Outlook for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, OneNote for Microsoft 365, Project Online Desktop Client, Publisher for Microsoft 365, Excel for Microsoft 365 for Mac, Word for Microsoft 365 for Mac, Outlook for Microsoft 365 for Mac, PowerPoint for Microsoft 365 for Mac, OneNote for Microsoft 365 for Mac, Excel 2024, Word 2024, Outlook 2024, PowerPoint 2024, Access 2024, OneNote 2024, Project Professional 2024, Project Standard 2024, Visio Professional 2024, Visio Standard 2024, Office 2024, Excel 2024 for Mac, Word 2024 for Mac, Outlook 2024 for Mac, PowerPoint 2024 for Mac, OneNote 2024 for Mac, Office 2024 for Mac, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project Professional 2021, Project Standard 2021, Publisher 2021, Visio Professional 2021, Visio Standard 2021, Excel 2021 for Mac, Word 2021 for Mac, Outlook 2021 for Mac, PowerPoint 2021 for Mac, OneNote 2021 for Mac, Office 2021 for Mac, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Professional 2019, Project Standard 2019, Publisher 2019, Visio Professional 2019, Visio Standard 2019, Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, Access 2016, OneNote 2016, Project Professional 2016, Project Standard 2016, Publisher 2016, Visio Professional 2016, Visio Standard 2016, OneNote for Mac, Microsoft 365 for home, Office 365 Small Business, Microsoft 365 admin, Project Online, Microsoft 365 for Mac, Project for Office 365
联系我们 - Microsoft 支持部门
联系 Microsoft 支持人员。查找常见问题的解决方案，或从支持专员那里获取帮助。
Xbox 强制措施类型 | Xbox Support
为了帮助你更好地了解我们的流程，我们提供了每种强制措施类型的详细信息以及这些措施对你的 Xbox 档案或设备的影响。
Find your error code | Xbox Support
This page features a list of common error codes and solutions. Learn how to find your error code quickly.
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。
在电脑或 Mac 上下载、安装或重新安装 Microsoft 365 或 Office 2024
准备好安装 Microsoft 365 或 Office 2024 了吗？ 开始之前，请确保你的电脑或 Mac 满足 系统要求。 如果已兑换产品密钥并重新安装了应用，或者通过工作或学校分配了许可证，可以跳过并转到登录下载 和安装 Microsoft 365 或 Office 的部分。 但是，如果这是你 第一次 安装 Microsoft 365 或 Office，则可能需要先 ...
Applies To:
Office 2024, Office 2024 for Mac, Microsoft 365 for home, Office 365 Small Business, Microsoft 365 admin, Microsoft 365 for Mac
Activate Windows | Microsoft Support
Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.
حالة Xbox | Xbox Support
تحقق من خدمات وألعاب وتطبيقات Xbox بحثًا عن أي انقطاع في الخدمة.
July 14, 2026-KB5102201 Cumulative Update for .NET Framework 3.5, 4.7.2 ...
July 14, 2026-KB5102201 Cumulative Update for .NET Framework 3.5, 4.7.2 and 4.8 for Windows 10, version 1809 and Windows Server 2019
Contact - Microsoft Support
Support for Windows 10 has ended on October 14, 2025. Learn more about your options for Windows 10.