Download and install or reinstall Microsoft 365 or Office 2021 on a PC ...
Change from a 32-bit version to a 64-bit version or vice versa. Activate Windows. Fix Bluetooth problems in Windows. Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.
Applies To:
Office 2021, Office 2021 for Mac, Office 2019, Office 2019 for Mac, Microsoft 365 for home, Office for business, Office 365 Small Business, Microsoft 365 admin, Office 365 operated by 21Vianet, Office 365 operated by 21Vianet - Admin, Microsoft 365 for Mac, Office 365 Germany - Enterprise, Office 365 Germany - Enterprise admin
用于 Microsoft XML Core Services (MSXML) 4.0 Service Pack 2 的更新的说明
当您访问某个 Web 站点或运行某个应用程序，使用 Microsoft XML Core Services (MSXML) (MSXML)加载 XHTML 文档时，MSXML 每次都将请求发送到万维网联合会 (W3C) 来获取已知的文档类型定义 (DTD) 文件。这种现象可能会使 W3C 服务器严重阻塞。有时，您可能会发现因为 DTD 请求被 W3C 服务器阻止而未能成功加载 XHTML ...