If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track.

System File Checker is a utility in Windows that checks for problems with files on your computer. To run it, follow these steps: Make sure you've installed the latest updates for Windows, and then restart your machine. To find out more, read Update Windows.

Команда sfc /scannow проверит все защищенные системные файлы и заменит поврежденные файлы их кэшированной копией, расположенной в сжатой папке по адресу %WinDir%\System32\dllcache.

The second protection mechanism that is provided by the WFP feature is the System File Checker (Sfc.exe) tool. At the end of GUI-mode Setup, the System File Checker tool scans all the protected files to make sure that they are not modified by programs that were installed by using an unattended installation.

If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track.

如果运行的是 Windows 10、Windows 8.1 或 Windows 8，请先运行收件箱部署映像服务和管理 (DISM) 工具，然后再运行系统文件检查器。 (如果运行的是 Windows 7 或 Windows Vista，请跳到步骤 3.) 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。 DISM.exe /Online /Cleanup-image /Restorehealth. 重要说明： 运行此命令时，DISM 使用 Windows 更新提供修复损坏所需的文件。

El comando sfc /scannow examinará todos los archivos de sistema protegidos y remplaza los archivos dañados con una copia en caché ubicada en una carpeta comprimida en %WinDir%\System32\dllcache. El marcador de posición %WinDir% representa la carpeta del sistema operativo Windows.

When you try to use a program on your computer, you receive an error that includes the User32.dll file in its description. This problem may occur for several reasons. This article contains general step-by-step methods that you can use to try to resolve this problem.

Fix-it tools aren’t used in Windows 10. Instead, use a troubleshooter to help solve problems with your PC.

Follow these steps to automatically diagnose and repair Windows security problems by turning on UAC, DEP protection, Windows Firewall, and other Windows security options and features. Select the Download button on this page. In the File Download dialog box, click Run or Open, and then follow the steps in the Windows Security Troubleshooter.