Fix USB-C problems in Windows - Microsoft Support
Learn how to troubleshoot USB-C problems in Windows and fix USB devices, ports, and adapters not working properly.
I can't send or receive messages in Outlook - Microsoft Support
In Outlook, sometimes your outgoing messages get stuck in your outbox and just won't send. Learn about some ways to get them moving.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Outlook 2013, Microsoft 365 admin
登录 Office - Microsoft 支持
通过桌面应用程序或 Web 浏览器登录 Office 或 Microsoft 365。
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, Visio Plan 2, 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 for the web, Word for the web, OneNote for the web, PowerPoint for the web, 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 2019 for Mac, Word 2019 for Mac, Outlook 2019 for Mac, PowerPoint 2019 for Mac, OneNote 2019 for Mac, Office 2019 for Mac, 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 for business, Office 365 Small Business, Microsoft 365 admin, Project Online, Microsoft 365 for Mac
检查你的 DirectX 版本 - Microsoft 支持
检查你的版本. DirectX 是许多 Windows 游戏都需要的一种多媒体技术套件。 如果你的电脑未安装正确版本的 DirectX（产品包装盒上应标有所需的版本），游戏可能无法正常运行。
Sign in to SharePoint - Microsoft Support
Training: Get started with SharePoint in Microsoft 365. At office.com, sign in to SharePoint, then select the SharePoint tile.
Applies To:
SharePoint in Microsoft 365
Contact Skype support - Microsoft Support
Explore subscription benefits, browse training courses, learn how to secure your device, and more.
How do I create a new account for Skype? - Microsoft Support
How do I create a new account for Skype? Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.
Skype help & learning
Get help and learn how to use Skype with Microsoft's official support page.
Open Device Manager - Microsoft Support
Open Device Manager. By pressing submit, your feedback will be used to improve Microsoft products and services.
Edit a PDF - Microsoft Support
Open and edit PDF content in Word. To edit a PDF, open it in Word. This works best with PDFs that are mostly text.
Applies To:
Word for Microsoft 365, Word 2021, Word 2019, Word 2016