When critical Windows system files are missing or corrupted, some Windows features may stop working correctly or Windows may stop responding altogether. If this happens, you can use the Deployment Image Servicing and Management tool (DISM) and the System File Checker tool (SFC) to scan your system files and restore any corrupted or missing files.

Cumulative Update 15 for Microsoft Exchange Server 2019 was released on February 10, 2025. It includes fixes for nonsecurity issues and all previously released fixes for security and nonsecurity issues. These fixes will also be included in later cumulative updates for Exchange Server 2019.

To use Windows Backup, you need to sign in with your Microsoft account. This ensures that your backed-up information is stored securely in the cloud, making it accessible from any device you sign into with the same account.

Learn how to update your security processor or TPM firmware to protect Windows 10 and your device from attacks by malicious software.

Use this app to try to recover lost files that have been deleted from your local storage device (including internal drives, external drives, and USB devices) and can’t be restored from the Recycle Bin.

此更新解决了 Windows作系统的安全问题。 此安全更新包括 2025 年 1 月 28 日发布的更新KB5050094 () 的改进。 下面是此更新在安装此知识库时解决的关键问题的摘要。 如果有新功能，也会列出这些功能。 括号中的粗体文本表示我们记录的更改的项目或区域。 此更新对内部 OS 功能进行了其他安全改进。 此版本没有记录其他问题。 如果已安装较早的更新，那么此程序包中只有新的更新程序会下载并安装到设备上。 有关安全漏洞的详细信息，请参阅 安全更新指南 网站和 2025 年 2 月安全汇报。 此更新对服务堆栈进行了质量改进，服务堆栈是安装 Windows 更新的组件。 服务堆栈更新 (SSU) 可确保你拥有强大且可靠的服务堆栈，让你的设备可以接收和安装 Microsoft 更新。

Follow these steps to reinstall Windows using the recovery media: Start your device from the USB drive that was created with Recovery Drive. The process to boot from a USB drive may vary by manufacturer, so refer to your device's manual if needed.

当关键的 Windows 系统文件丢失或损坏时，某些 Windows 功能可能会停止正常工作，或者 Windows 可能会完全停止响应。 如果发生这种情况，可以使用部署映像服务和管理工具 (DISM) 和系统文件检查器工具 (SFC) 扫描系统文件并还原任何损坏或丢失的文件。 DISM 提供修复损坏的文件所需的文件。 应在运行系统文件检查器之前运行 DISM。 为此： 打开提升的命令提示符。 在 “搜索 ”框中键入 cmd。 在搜索结果中，右键单击“ 命令提示符 ”，然后选择“ 以管理员身份运行 ”。 如果系统提示确认或管理员密码，请键入密码，或单击“ 允许 ”。 在 “命令提示符” 窗口中，键入以下命令，然后按 Enter。 完成命令操作可能需要几分钟时间。

To access the code, you'll need a tool for reading MSI files—which is typically available to IT professionals. You'll find the product code in the property table of the MSI file. The troubleshooter helps fix problems that: Corrupt registry keys on 64-bit operating systems. Corrupt registry keys that control the update data.

These new features will remain dormant until they are turned on through the “enablement package,” a small, quick-to-install “master switch” that activates the Windows 10, version 20H2 features.